A Level

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

Problem

Evaluate

\sin\Bigl(\dfrac{\pi}{2}-225^{\circ}\Bigr)

. (a)

0

(b)

-\dfrac{\sqrt{3}}{2}

(c)

-\dfrac{\sqrt{2}}{2}

(d)

\dfrac{\sqrt{2}}{2}

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