sinx-sin(x-60)化简 日期:2016-10-26 15:54:49 人气:1 sinx-sin(x-60)化简 解答 sinx-(sinxcos60-cosxsin60) =sinx-1/2sinx+根号3/2cos60 =根号3/2cosx+1/2sinx =sin(60+x)