GENERAL SOL.|SINtheta| = 1/2

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|sinθ| = 1/2 means that

sinθ = 1/2 or sinθ = -1/2

sinθ = 1/2 in 1st and 2nd quadrants.
sinθ = -1/2 in 3rd and 4th quadrants

So, θ = nπ ± π/6 for any integer n.

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