# Negative Cotangent Angles

## Description

Illustration that can be used to show that if the cotangent of an angle is negative the angle must terminate in either the second or fourth quadrant.

## Keywords

angle, cot, cotangent, inverse function, negative angles, reference, Tan, tangent, trig functions, trigonometric, trigonometry

## Galleries

## Source:

George N. Bauer, PH.D. and W.E. Brooke, C.E., M.A. *Plane And Spherical Trigonometry* (Boston: D.C. Heath & Co., 1917) 80

Courtesy the private collection of Roy Winkelman