Trigonometry Examples

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

Step 1

Move the negative in front of the fraction.

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

Step 2

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

$y = \frac{2 π}{3}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$y = \frac{2 π}{3}$

Decimal Form:

$y = 2.09439510 \dots$