Question

How do you evaluate `cot((-3pi)/4)`?

Answer 1

1

Explanation:

First, find `tan ((-3pi)/4)`.
Trig table and unit circle give -->
`tan ((-3pi)/4) = tan ((-3pi)/4 + pi) = tan (pi/4) = 1`
There for:
`cot ((-3pi)/4) = 1/(tan (pi/4)) = 1/1 = 1`