For an acute angle

MATHEMATICS · Single correct · GCSE · Mathematics · Geometry and Measures · Geometry and Measures

Problem

For an acute angle θ\theta, if 2sin⁡θ=cos⁡θ2\sin \theta=\cos \theta, determine sin⁡θ\sin \theta. (a) 25\dfrac{2}{\sqrt5} (b) 12\dfrac12 (c) 15\dfrac{1}{\sqrt5} (d) 25\sqrt{\dfrac{2}{5}}

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