Answer:
y = tan x, y = cot x
Explanation:
We are given the following functions and we are to determine whether which of them have a range of all real numbers:
y = csc x
y = tanx
y = cotx
y = sec x
Range is the values of y which a function can take so range of tan x and cot x are all real numbers.
Period of tan x and cot x is .