A Level

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

Problem

Evaluate

\sin^2\left(\dfrac{\pi}{8}\right)

. (a)

\dfrac{2+\sqrt{2}}{4}

(b)

\dfrac{2-\sqrt{2}}{4}

(c)

\dfrac{\sqrt{2-\sqrt2}}{2}

(d)

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