4.8 The Cotangent Function and the Inverse Cotangent Function

. The Cotangent Function and the Inverse Cotangent Function The cotangent function is given by cot . It is defined for all real values of x , except when tan x = or x ∈ π ,  . Thus, the domain of cotangent function is \ : ∈ { } and its range is −∞∞ . Like tan x , the cotangent function is an odd function and periodic with period π .