Precalculus Examples

$y = - 5 \sin (\frac{5 π}{2})$

Step 1

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

$y = - 5 \sin (\frac{π}{2})$

Step 2

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

$y = - 5 \cdot 1$

Step 3

Multiply $- 5$ by $1$ .

$y = - 5$