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3 June, 12:26

Find all values of θ in the interval 0° ≤ θ < 360° that satisfy the equation sin 2θ = sin θ.

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  1. 3 June, 14:56
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    Sin 2θ = sin θ

    2sin θ cos θ = sin θ

    2cos θ = 1

    cos θ = 1/2

    θ = arccos (1/2) = 60° and 300°

    θ = 60° and 300°
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