-sinx=cos((3π/2-x)从-sinx推导

来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/23 04:12:30
-sinx=cos((3π/2-x)从-sinx推导-sinx=cos((3π/2-x)从-sinx推导-sinx=cos((3π/2-x)从-sinx推导cos(3π/2－x)=cos(3π/2)c

-sinx=cos((3π/2-x)从-sinx推导
-sinx=cos((3π/2-x)
从-sinx推导

-sinx=cos((3π/2-x)从-sinx推导
cos(3π/2－x)=cos(3π/2)cosx＋sin(3π/2)sinx=－sinx
则：
－sinx=cos(3π/2－x)

-sinx = cos(π/2)cosx-sin(π/2)sinx
= cos(π/2+x)
= cos[2π-(3π/2-x)]
= cos(3π/2-x)