> 数学 >
sin5/3π= ,cos5/3π
人气:325 ℃ 时间:2020-04-09 19:30:19
解答
sin5/3π
=sin(π+2/3π)
=-sin2/3π
=-√3/2
cos5/3π
=cos(π+2/3π)
=-cos2/3π
=1/2
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版