> 数学 >
用诱导公式求这个简单的三角函数值.(急!)
sin(-26π/3)
人气:315 ℃ 时间:2020-10-01 10:44:45
解答
sin(-26π/3)
=sin(-26π/3+5*2π)
=sin(4π/3)
=sin(π+π/3)
=-sinπ/3
=-√3/2
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版