已知F(X)=SINX/2+2cos^2x/4

问题描述:

已知F(X)=SINX/2+2cos^2x/4

是要化简的意思嘛~
f(x)=sin x/2 +2cos^2 x/4 -1 +1
=sin x/2 +cos x/2 +1
=根号2*sin(x/2 + π/4)+1