sin(x+派⼀6)是等于cos(x-派⼀3)吗?为什么啊?

2025-03-14 00:49:55
推荐回答(1个)
回答1:

sin【x+π/6】
=cos【π/2-(x+π/6)】
=cos【-(x-π/3)】
=cos(x-π/3)