Trigonometry Examples

$y = \arctan (\tan (\frac{5 π}{9}))$

Step 1

Evaluate $\tan (\frac{5 π}{9})$ .

$y = \arctan (- 5.67128181)$

Step 2

Evaluate $\arctan (- 5.67128181)$ .

$y = - \frac{4 π}{9}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$y = - \frac{4 π}{9}$

Decimal Form:

$y = - 1.39626340 \dots$

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