Trigonometry Examples

$\arccos (\cos (\frac{15 π}{7}))$

Step 1

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

$\arccos (\cos (\frac{π}{7}))$

Step 2

The result can be shown in multiple forms.

Exact Form:

$\arccos (\cos (\frac{π}{7}))$

Decimal Form:

$0.44879895 \dots$