Trigonometry Examples

$\cos^{2} (\frac{1}{2} \cdot \arccos (- \frac{5}{13}))$

Step 1

Evaluate

$\arccos (- \frac{5}{13})$ .

$\cos^{2} (\frac{1}{2} \cdot 1.96558744)$

Step 2

Combine

$\frac{1}{2}$ and

$1.96558744$ .

$\cos^{2} (\frac{1.96558744}{2})$

Step 3

Divide

$1.96558744$ by

$2$ .

$\cos^{2} (0.98279372)$

Step 4

The result can be shown in multiple forms.

Exact Form:

$\cos^{2} (\frac{1}{2} \cdot \arccos (- \frac{5}{13}))$

Decimal Form:

$0.\overline{307692}$