Trigonometry Examples

$\cos (2 \arctan (\frac{8}{15}))$

Step 1

Evaluate $\arctan (\frac{8}{15})$ .

$\cos (2 \cdot 0.48995732)$

Step 2

Multiply $2$ by $0.48995732$ .

$\cos (0.97991465)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\cos (2 \arctan (\frac{8}{15}))$

Decimal Form:

$0.55709342 \dots$

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