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【332199】【推荐】28.1 锐角三角函数(第1、2课时)-同步练习(3)B

时间:2025-01-21 12:27:45 作者: 字数:2242字
简介:

28.1 锐角三角函数——正弦、余弦、正切

1.把RtA <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> BC各边的长度都扩大3倍得RtABC,那么锐角AA的余弦值的关系为(

AcosA=cosA BcosA=3co <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> sA C3cosA=cosA D.不能确定

2.如图1,已知P是射线OB上的任意一点,PMOAM,且PMOM=34,则[来源:Z&xx&k.Com]

cosα的值等于(

A <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> B  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> C <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> D  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 1 2 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 3

3.在△ABC中,∠C=90°,∠A,∠B,∠C的对边分别是abc,则 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 下列各项中正确 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 的是( [来源:Zxxk.Com]

Aa=c·sinB Ba=c·cosB Ca=c·tanB D.以上均不正确

4.在RtABC中,∠C=90°cosA= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> ,则tanB等于(

A  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> B <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> C  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> D  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

5.在RtABC中,∠C=900167AC=5AB=13,则sinA=_ <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> _____cosA=______tanA=_______

6.如图2,在△ABC中,∠ <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> C=90°BCAC=12,则sinA=_______cosA= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> ______tanB=______ [来源:学科网]

7.如图3,在RtABC中,∠C=90°b=20c=20 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> ,则∠B的度数为_______

8.如图116,在△CDE中,∠E=90°DE=6CD=10,求∠D的三个三角函数值.

 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

9.已知:α <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 是锐角,tanα=  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> ,则sinα=_____cosα=_______

10.如图,角α的顶点在直角坐标系的原点,一边在x轴上,另一边经过点P22 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> ),求角α的三个三角函数值.[来源:学。科。网ZXXK]

 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>




11.在RtABC中,两边的长分别为34,求最小角的正弦值.

[来源:Zxxk.Com]





12.如图,在△ABC中,∠ABC=90°BDACD,∠CBD=αAB=3BC=4s <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> inαcosαtanα的值.

 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>



12999.com

参考答案:

1A 2C 3B 4C 5  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

6 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 2 745°

8sinD= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> cosD=  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> tanD= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 9  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 

10sinα= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> cosα=  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> tanα= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 11  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a>

12sinα=  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> cosα= <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> tanα=  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/145/" title="推荐" class="c1" target="_blank">推荐</a> <a href="/tags/179/" title="锐角" class="c1" target="_blank">锐角</a> <a href="/tags/944/" title="三角函数" class="c1" target="_blank">三角函数</a> 本资料由《学科网》www.zxxk.com 提供!