化解‘sin方x-2sinx+cosx+3cos方x’
问题描述:
化解‘sin方x-2sinx+cosx+3cos方x’
RT
答
-2 sin(x)+cos(x)+cos(2 x)+2
化解‘sin方x-2sinx+cosx+3cos方x’
RT
-2 sin(x)+cos(x)+cos(2 x)+2