Trigonometry Examples

$\arccos (\frac{- 1}{2})$

Step 1

Move the negative in front of the fraction.

$\arccos (- \frac{1}{2})$

Step 2

The exact value of $\arccos (- \frac{1}{2})$ is $\frac{2 π}{3}$ .

$\frac{2 π}{3}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{2 π}{3}$

Decimal Form:

$2.09439510 \dots$