Trigonometry Examples

$\arccos (\cos (\frac{38 π}{13}))$

Step 1

Subtract full rotations of $2 π$ until the angle is greater than or equal to $0$ and less than $2 π$ .

$\arccos (\cos (\frac{12 π}{13}))$

Step 2

The result can be shown in multiple forms.

Exact Form:

$\arccos (\cos (\frac{12 π}{13}))$

Decimal Form:

$2.89993168 \dots$