Answer
Showed that given statement, $\frac{\cos\theta}{\sec\theta}$ = $\cos^{2}\theta$,
is an identity as left side transforms into right side.
Work Step by Step
Given statement is-
$\frac{\cos\theta}{\sec\theta}$ = $\cos^{2}\theta$
Left Side = $\frac{\cos\theta}{\sec\theta}$
= $\frac{\cos\theta}{1/\cos\theta}$
(Using reciprocal identity)
= $ \cos\theta \times \frac{\cos\theta}{1}$
= $\cos^{2}\theta$
= Right Side
i.e. Left Side transforms into Right Side
i.e. Given statement, $\frac{\cos\theta}{\sec\theta}$ = $\cos^{2}\theta$,
is an identity.
