Which of the functions have a range of all real numbers

y = tan x, y = cot x

Step-by-step 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 .

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