Precalculus Examples

$\cos (45)$

Step 1

The supplement of $\cos (45)$ is the angle that when added to $\cos (45)$ forms a straight angle ( $180 °$ ).

$180 ° - \cos (45)$

Step 2

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

$180 - \frac{\sqrt{2}}{2 °}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$180 - \frac{\sqrt{2}}{2 °}$

Decimal Form:

$179.29289321 \dots$