1. 0,5 sin 2x +cos x = 0
2. 4 sin2 x +4 sin x -3 = 0
3. 4 cos2 x + 4 sinx -1 = 0
4. 1 + cos x – 2 cos x/2 = 0
5. ( 1 – cos 4x) = sin 2x.
6. 2 cos2( 2π + x) = 3 cos (π/2 – x) +2
7. 5 sin2x + 4 sin ( π/2 +x) = 4
8. cos2x - 3 sin x cos x + 1 =0
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