1) 2sin^2x + 3sinx= 2
2) tg^2x - 4tgx + 3= 0
3)2 cos^2x - 5cosx = 3
4)2sin^2x+sunx=0
5)6sin^2x - 2sin2x=1
6)sin^2x - cos^2x= [tex] \sqrt{2}/2[/tex]
7)4sinx*cosx=[tex] \sqrt{3} [/tex]
8)cos^4x - sin^4x=1

7)4sinx*cosx=√32*(2sinx*cosx)=√32sin2x=√3sin 2x=√3/22x₁=π/3+2πk, k∈Z2x₂=2π/3+2πk, k∈Zx₁=π/6+πk, k∈Zx₂=π/3+πk, k∈Z