A periodic curve passes through

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

Problem

(0,1)

, has its next zero at

x=\dfrac{\pi}{2}

, and attains its minimum value

-1

x=\pi

. Which equation represents this curve? (a)

y=\sin x

(b)

y=\cos 2x

(c)

y=\cos x

(d)

y=-\cos x