> 数学 >
若sin(π/4+α)=m,求cos(π/4-α)的值
人气:299 ℃ 时间:2020-05-14 10:07:33
解答
cos(π/4-α)
=sin[π/2-(π/4-α)]
=sin(π/4 +α)
=m
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版