Trigonometry Examples

$\cos (- \frac{12}{13})$

Step 1

Since $\cos (- \frac{12}{13})$ is an even function, rewrite $\cos (- \frac{12}{13})$ as $\cos (\frac{12}{13})$ .

$\cos (\frac{12}{13})$

Step 2

The result can be shown in multiple forms.

Exact Form:

$\cos (\frac{12}{13})$

Decimal Form:

$0.60336928 \dots$