Trigonometry Examples

$\cot (630)$

Step 1

Remove full rotations of $360$ ° until the angle is between $0$ ° and $360$ °.

$\cot (270)$

Step 2

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

$\cot (90)$

Step 3

The exact value of $\cot (90)$ is $0$ .

$0$