Precalculus Examples

$x = \arctan (- 1)$

Step 1

The exact value of $\arctan (- 1)$ is $- \frac{π}{4}$ .

$x = - \frac{π}{4}$

Step 2

The result can be shown in multiple forms.

Exact Form:

$x = - \frac{π}{4}$

Decimal Form:

$x = - 0.78539816 \dots$