Question

What are the domain and range of y=cot x? Select one choice for domain

and one for range.

A. Domain: All real numbers
B. Domain: 2 n
C. Range: All real numbers
D. Range: -1 ≤ y ≤ 1

Answer 1

The domain is
`\boxed{x \\eq n\pi}`, where n is an integer.

• This is because cot x = 1/tan(x), and if tan x = 0, then the fraction is undefined.

The range is all real numbers.