Answer
No solution, as $-1 \leq sin\theta \leq 1$
Work Step by Step
$sin\theta -4 = -2sin\theta$
$sin\theta + 2sin\theta = 4$
$3sin\theta = 4$
$sin\theta = \frac{4}{3}$
No solution, as $-1 \leq sin\theta \leq 1$
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