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1.7.21 Use identities to solve equations (A-level only)

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Question 1
23%

Solve, for −180≤x≤180-180 \leq x \leq 180−180≤x≤180, the equation,

cos⁡2x+5sin⁡x+2=0 \cos 2x + 5 \sin x + 2 = 0 cos2x+5sinx+2=0
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1.7.21 Use identities to solve equations (A-level only) Questions

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