Solve for on

MATHEMATICS · Multi-part · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Solve for xx on 0≤x≤2π0\leq x\leq2\pi, giving your answers as exact values: (1) 2sin⁡2x+sin⁡x=02\sin^2x+\sin x=0 (2) 2cos⁡2x+cos⁡x−1=02\cos^2x+\cos x-1=0

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