y=2根号3sin^2x+sin2x+1 求值域
问题描述:
y=2根号3sin^2x+sin2x+1 求值域
答
y=√3(1-cos2x)+sin2x+1
=1+√3+sin2x-√3cos2x
=1+√3+2sin(2x-60°)
1+√3-2