Which of the following is an equivalent form of expressed solely in terms of ?

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

Problem

Which of the following is an equivalent form of

\cos 2\theta

expressed solely in terms of

\sin \theta

? (a)

2\sin\theta\cos\theta

(b)

1-2\sin^2\theta

(c)

1-\sin^2\theta

(d)

1+2\sin^2\theta