Precalculus Examples

$\csc (- \frac{19 π}{2})$

Step 1

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

$\csc (\frac{π}{2})$

Step 2

The exact value of $\csc (\frac{π}{2})$ is $1$ .

$1$