Without using a calculator

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Without using a calculator, evaluate sin⁡75∘cos⁡15∘+cos⁡75∘sin⁡15∘\sin 75^{\circ}\cos 15^{\circ}+\cos 75^{\circ}\sin 15^{\circ}.

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