# Trig

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Solve 2cosxsinx + sinx = 0 using unit circle.

• Trig -

2cosxsinx + sinx = 0
sinx(2cosx + 1) = 0
sinx = 0 or cosx = -1/2
x = 0, π, 2π or x = 2π/3, 4π/3

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