Find the exact value of .

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Find the exact value of sin⁡215∘\sin^2 15^{\circ}. (a) 2+34\dfrac{2+\sqrt3}{4} (b) 2−34\dfrac{2-\sqrt3}{4} (c) 6−24\dfrac{\sqrt6-\sqrt2}{4} (d) 3−36\dfrac{3-\sqrt3}{6}

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