Precalculus Examples

$\frac{9 π}{2}$

Subtract $2 π$ from $\frac{9 π}{2}$ .

$\frac{9 π}{2} - 2 π$

The resulting angle of $\frac{5 π}{2}$ is positive, less than $2 π$ , and coterminal with $\frac{9 π}{2}$ .

$\frac{5 π}{2}$

Subtract $2 π$ from $\frac{5 π}{2}$ .

$\frac{5 π}{2} - 2 π$

The resulting angle of $\frac{π}{2}$ is positive, less than $2 π$ , and coterminal with $\frac{9 π}{2}$ .

$\frac{π}{2}$