Question

How do you find arccot(-2)?

Answer 1

Find arccot (-2)
Ans: 153.43 and 333.43 deg

Explanation:

`cot x = 1/tan x = -2` --> `tan x = 1/-2 = - 0.5`
Calculator gives -->arc `x = - 26.57` deg

Within interval `(0, 2pi)`, the 2 arc x are:
(- 26.57 + 180) = `153.43` deg, and (-26.57 + 360) = `333.43` deg