已知函数f(x)=2cos^2x+2sinxcosx+1
问题描述:
已知函数f(x)=2cos^2x+2sinxcosx+1
答
f(x)=2cos^2x+2sinxcosx+1
=cos2x+1+sin2x+1
=√2sin(2x+π/4)+2