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Y and A Tutoring Paper 1 with Answers and Hints · Q14

Paper 1TrigonometryAlgebra

Find the sum of all valid solutions to the following equation in the interval 0≤x≤2π0\le x\le2\pi:

sin⁡3x=(sin⁡2x−1)cos⁡x.\sin^3 x=(\sin^2 x-1)\cos x.
Aπ\pi
B2π2\pi
C5π2\frac{5\pi}{2}
D3π3\pi
E7π2\frac{7\pi}{2}

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