Precalculus Examples

$\cos (45) - \tan (60)$

Step 1

The exact value of $\cos (45)$ is $\frac{\sqrt{2}}{2}$ .

$\frac{\sqrt{2}}{2} - \tan (60)$

Step 2

The exact value of $\tan (60)$ is $\sqrt{3}$ .

$\frac{\sqrt{2}}{2} - \sqrt{3}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{\sqrt{2}}{2} - \sqrt{3}$

Decimal Form:

$- 1.02494402 \dots$