1) 4sin^x - sin2x +2cos^x= 4
2) 3sin^2 x/2 - sinx + cos^2x/2=1
3) 4sin^2 4x - 4sin4x - 3 = 0
4) sin^2 2x - sin4x - 3cos^2x=0
5) căn 3tan^2x + cos2x = căn 3
6) tan^2 3x - 4cot3x = 3 = 0
7) cosx - căn 3sinx = 1
8) căn 3sin2x + cos2x = căn 3
Loga
Sinh Học lớp 12
