Precalculus Examples

$\tan (25) - \frac{\sin (25)}{\cos (25)}$

Step 1

Rewrite $\tan (25)$ in terms of sines and cosines.

$\frac{\sin (25)}{\cos (25)} - \frac{\sin (25)}{\cos (25)}$

Step 2

Combine the numerators over the common denominator.

$\frac{\sin (25) - \sin (25)}{\cos (25)}$

Step 3

Subtract $\sin (25)$ from $\sin (25)$ .

$\frac{0}{\cos (25)}$

Step 4

Divide $0$ by $\cos (25)$ .

$0$