Solve the equation (2 cos x) = (sin 2 x) , for 0 ≤ x ≤ 3π .
cos x = 0, sin x = 1, solved using trigonometric identities. 3(pi) means 3/2 times round a the circle, therefore using graphs answer is pi/2, 3(pi/2), 5(pi/2)
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