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Mathematics 19 Online
OpenStudy (anonymous):

Solve the equation: 2 cos A - 2 cos 2A = 1 0 ≤ x ≤ 2pi I got cos A = 2 But the answer is π/5, 3π/5, 7π/5, or 9π/5 Help me please ... thanks!

OpenStudy (primeralph):

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