cosx-√3sinx = 2cos(x+π/3)

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/12 07:23:17
cosx-√3sinx = 2cos(x+π/3)

cosx-√3sinx = 2cos(x+π/3)
cosx-√3sinx = 2cos(x+π/3)

cosx-√3sinx = 2cos(x+π/3)
因为2cos(x+60)=2(cosxcos60-sinxsin60
=cosx-√3sinx
所以左右相等