配套习题- 锐角三角函数 -【青果学院】

1/5单选题

难度：

1.

在Rt△ABC中，∠C=90°，若AC=2，BC=1，则tanA的值是( )

A
B	2
C
D

正确答案：QQ==

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

2/5单选题

难度：

2.

如图，△ABC的顶点都是正方形网格中的格点，则cos∠ABC等于（　　）

A
B
C
D

正确答案：Qg==

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

3/5单选题

难度：

3.

在Rt△ABC中，∠C=90°，AB=13，AC=12，则cosA=（　　）

A
B
C
D

正确答案：Qw==

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

4/5单选题

难度：

4.

在Rt△ABC中，∠C=90°，若AB=2AC，则cosA的值等于（）

A
B
C
D

正确答案：Qw==

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

5/5单选题

难度：

5.

在Rt△ABC中，∠C=90°，若cosB＝，则sinB的值得是（　　）

A
B
C
D

正确答案：QQ==

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