y=√3sinxcosx+3cos^2x-3/2
=(√3/2)sin2x+(3/2)(2cos^2x-1)]
=(√3/2)sin2x+(3/2)cos2x
=√3[(1/2)sin2x+(√3/2)cos2x
=√3(sin2xcosπ/3+cos2xsinπ/3)
=√3sin(2x+π/3)
不知道求什么,只能给你做到这里了,
y=√3sinxcosx+3cos^2x-3/2
=(√3/2)sin2x+(3/2)(2cos^2x-1)]
=(√3/2)sin2x+(3/2)cos2x
=√3[(1/2)sin2x+(√3/2)cos2x
=√3(sin2xcosπ/3+cos2xsinπ/3)
=√3sin(2x+π/3)
不知道求什么,只能给你做到这里了,