已知函数f(x)等于cos2x-sin2x+2[3sinxcosx+1求f(0)的值

问题描述:

已知函数f(x)等于cos2x-sin2x+2[3sinxcosx+1求f(0)的值

x=0代入
f(0)=cos0-sin0+2(3sin0cos0+1)
=1-0+2(0+1)
=3