Trigonometry Examples

$\arccos (\frac{- \sqrt{2}}{2})$

Step 1

Move the negative in front of the fraction.

$\arccos (- \frac{\sqrt{2}}{2})$

Step 2

The exact value of $\arccos (- \frac{\sqrt{2}}{2})$ is $\frac{3 π}{4}$ .

$\frac{3 π}{4}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{3 π}{4}$

Decimal Form:

$2.35619449 \dots$