Precalculus Examples

$\cos (a) \sec (a)$

Step 1

Reorder $\cos (a)$ and $\sec (a)$ .

$\sec (a) \cos (a)$

Step 2

Rewrite $\cos (a) \sec (a)$ in terms of sines and cosines.

$\frac{1}{\cos (a)} \cos (a)$

Step 3

Cancel the common factors.

$1$