Question
If sin(3θ) = cos(2θ), find
θ.Solution
We know sin(3θ) = cos(2θ). Using the identity cos(2θ) = sin(90° - 2θ) 3θ = 90° - 2θ Solving 3θ = 90° - 2θ gives 5θ = 90°, so θ = 18°. Answer: a
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