Trigonometry Examples

$\cot (\frac{7 π}{2})$

Step 1

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

$\cot (\frac{3 π}{2})$

Step 2

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cotangent is negative in the fourth quadrant.

$- \cot (\frac{π}{2})$

Step 3

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

$- 0$

Step 4

Multiply $- 1$ by $0$ .

$0$