Math/Trigonometry
posted by CJ .
1. Solve: 2 cos² x  3 cos x + 1 = 0 for 0 ≤ x < 2pi.
2. Solve: 2 sin x  1 = 0 for 0° ≤ x < 360°
3. Solve: sin² x = cos² x for 0° ≤ x < 360°
4. Solve: sin x  2sin x cos x = 0 for 0 ≤ x < 2p
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