Trigonometry Examples

cos (- 990)

$\cos (- 990)$

Step 1

Add full rotations of

360

$360$ ° until the angle is between

0

$0$ ° and

360

$360$ °.

cos (90)

$\cos (90)$

Step 2

The exact value of

cos (90)

$\cos (90)$ is

0

$0$ .

0

$0$

⎡ ⎢ ⎣ \begin{matrix} x^{2} & \frac{1}{2} \sqrt{π} & \int x d x \end{matrix} ⎤ ⎥ ⎦

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