Evaluate , giving your answer in simplest radical…

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

Problem

Evaluate 4sin⁡42∘cos⁡18∘+4cos⁡42∘sin⁡18∘4\sin 42^{\circ}\cos 18^{\circ}+4\cos 42^{\circ}\sin 18^{\circ}, giving your answer in simplest radical form.

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