试题与答案

若sinA=45,且A是三角形中的一个角,则5sinA+815cosA-7=__

题型:填空题

题目:

sinA=
4
5
,且A是三角形中的一个角,则
5sinA+8
15cosA-7
=______.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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