cosx-√3sinx = 2cos(x+π/3)
来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 02:52:23
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
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