函数f(x)=sin^x+2倍根号3sinxcosx+3cos^2x若x属于[0,π/2]求值域?
问题描述:
函数f(x)=sin^x+2倍根号3sinxcosx+3cos^2x若x属于[0,π/2]求值域?
答
f(x)=sin^x+2倍根号3sinxcosx+3cos^2x
=(sin^2x+cos^2x)+根号3sin2x+(2cos^2x-1)+1
=1+根号3sin2x+cos2x+1
=2sin(2x+Pai/6)+2
0