cos(-585°)tan495°+sin(-690°)的值是（）_刷题宝

题干

cos585tan495sin690

(

-

°

)

°

+

(

-

°

)

的值是（）

A： $2 \sqrt{2}$

B： $\frac{\sqrt{2}}{3}$

C： $- \frac{\sqrt{2}}{3}$

D： $\sqrt{2}$

上一题下一题 0.0难度选择题更新时间:2018-02-09 03:17:43

答案(点此获取答案解析）

D

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