| 共 42 篇文章 |
|
阅76 转3 评0 公众公开 19-06-16 10:09 |
sin3α=4sinα·sin(π/3+α)sin(π/3-α)sin(α+β+γ)=sinα·cosβ·cosγ+cosα·sinβ·cosγ+cosα·cosβ·sinγ-sinα·sinβ·sinγ。cos(α+β+γ)=cosα·cosβ·cosγ-cosα·sinβ·sinγ-sinα·cosβ·sinγ-sinα·sinβ·cosγ。tan(α+β+γ)=(tanα+t... 阅1474 转5 评0 公众公开 19-06-16 10:04 |
