[00:00.00]90听音乐网 www.90T8.com [00:04.01]sin（2π+α）=sinα [00:05.96]cos（2π+α）=cosα [00:07.70]tan（2π+α）=tanα [00:09.68]sin（π+α）=-sinα [00:11.50]cos（π+α）=-cosα [00:13.39]tan（2π+α）=tanα [00:15.23]sin（π/2+α）=-cosα [00:16.93]sin（π/2-α）=cosα [00:18.53]cos（π/2+α）=-sinα [00:20.37]cos（π/2-α）=sinα [00:22.19]tan（π/2-α）=cotα [00:23.89]tan（π/2+α）=-cotα [00:25.53]sin（α+β）=cosα·cosβ+sinα·sinβ [00:28.53]cos（α+β）=cosα·cosβ-sinα·sinβ
LRC动态歌词下载
[00:00.00]90听音乐网 www.90T8.com[00:04.01]sin（2π+α）=sinα
[00:05.96]cos（2π+α）=cosα
[00:07.70]tan（2π+α）=tanα
[00:09.68]sin（π+α）=-sinα
[00:11.50]cos（π+α）=-cosα
[00:13.39]tan（2π+α）=tanα
[00:15.23]sin（π/2+α）=-cosα
[00:16.93]sin（π/2-α）=cosα
[00:18.53]cos（π/2+α）=-sinα
[00:20.37]cos（π/2-α）=sinα
[00:22.19]tan（π/2-α）=cotα
[00:23.89]tan（π/2+α）=-cotα
[00:25.53]sin（α+β）=cosα·cosβ+sinα·sinβ
[00:28.53]cos（α+β）=cosα·cosβ-sinα·sinβ
