Precalculus Examples

$\frac{2 \tan (\frac{π}{2})}{1 - \tan^{2} (\frac{π}{2})}$

Step 1

Rewrite $\tan (\frac{π}{2})$ in terms of sines and cosines.

$\frac{2 \frac{\sin (\frac{π}{2})}{\cos (\frac{π}{2})}}{1 - \tan^{2} (\frac{π}{2})}$

Step 2

The exact value of $\cos (\frac{π}{2})$ is $0$ .

$\frac{2 \frac{\sin (\frac{π}{2})}{0}}{1 - \tan^{2} (\frac{π}{2})}$

Step 3

The expression contains a division by $0$ . The expression is undefined.

Undefined