Precalculus Examples

$\frac{π}{5}$

Step 1

Evaluate $\cos (\frac{π}{5})$ .

$0.80901699$

Step 2

Evaluate $\sin (\frac{π}{5})$ .

$0.58778525$

Step 3

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

$(0.80901699, 0.58778525)$

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