Trigonometry Examples

$\cos (\frac{12}{15})$

Step 1

Factor $3$ out of $12$ .

$\cos (\frac{3 (4)}{15})$

Step 2

Cancel the common factors.

Tap for more steps...

Step 2.1

Factor $3$ out of $15$ .

$\cos (\frac{3 \cdot 4}{3 \cdot 5})$

Step 2.2

Cancel the common factor.

$\cos (\frac{3 \cdot 4}{3 \cdot 5})$

Step 2.3

Rewrite the expression.

$\cos (\frac{4}{5})$

$\cos (\frac{4}{5})$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\cos (\frac{4}{5})$

Decimal Form:

$0.69670670 \dots$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$