Precalculus Examples

$\frac{π}{2}$

Step 1

The exact value of $\cos (\frac{π}{2})$ is $0$ .

$0$

Step 2

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

$1$

Step 3

Set up the coordinates $(\cos (θ), \sin (θ))$ .

$(0, 1)$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$