# How do you find the angle #alpha# such that the angle lies in quadrant II and #cotalpha=-0.3899#?

##### 1 Answer

Aug 12, 2016

#### Explanation:

Tangent. and so, cotangent is negative in Q2. and Q4. For a

negative cotangent, the angle in Q4 [-pi/2, 0] is called the principal

value.

The Q2 value can be selected from the general value.

The reciprocal

The principal

The general value is

The minimum Q2-value is obtained for n = 1 as