Trigonometry Examples

$\cos (2 \arccos (\frac{9}{41}))$

Step 1

Evaluate $\arccos (\frac{9}{41})$ .

$\cos (2 \cdot 1.34948188)$

Step 2

Multiply $2$ by $1.34948188$ .

$\cos (2.69896376)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\cos (2 \arccos (\frac{9}{41}))$

Decimal Form:

$- 0.90362879 \dots$

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