An angle of is to be expressed in radians

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

Problem

An angle of

-45^{\circ}

is to be expressed in radians. Which of the following is the correct value? (a)

-\dfrac{\pi}{2}

(b)

\dfrac{\pi}{4}

(c)

-\dfrac{\pi}{4}

(d)

-\dfrac{\pi}{8}