Trigonometry Examples

$\cot (\frac{- 3 π}{2})$

Move the negative in front of the fraction.

$\cot (- \frac{(3) π}{2})$

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

$\cot (\frac{π}{2})$

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

$0$