Trigonometry Examples

$\frac{1}{\cos^{2} (a)}$

Step 1

Rewrite $1$ as $1^{2}$ .

$\frac{1^{2}}{\cos^{2} (a)}$

Step 2

Rewrite $\frac{1^{2}}{\cos^{2} (a)}$ as ${(\frac{1}{\cos (a)})}^{2}$ .

${(\frac{1}{\cos (a)})}^{2}$

Step 3

Convert from $\frac{1}{\cos (a)}$ to $\sec (a)$ .

$\sec^{2} (a)$