A Level

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

Problem

Simplify

\dfrac{\sin^4\theta+\cos^4\theta}{\sin^2\theta\,\cos^2\theta}

. (a)

\dfrac{1}{\sin^2\theta\cos^2\theta}+2

(b)

\dfrac{1}{\sin^2\theta\cos^2\theta}-2

(c)

2-\dfrac{1}{\sin^2\theta\cos^2\theta}

(d)

\tan^{2}\theta+\cot^{2}\theta