Precalculus Examples

$\sin^{2} (25) \tan (90) \log (2)$

Step 1

Rewrite $\tan (90)$ in terms of sines and cosines.

$\sin^{2} (25) \frac{\sin (90)}{\cos (90)} \log (2)$

Step 2

The exact value of $\cos (90)$ is $0$ .

$\sin^{2} (25) \frac{\sin (90)}{0} \log (2)$

Step 3

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

Undefined