Hello, I am preparing for the ACT and stumbled upon a question that I don't understand.
It says, "If tan x and cot x are defined, what is the value of (tan2x)(cot2x)?" (the 2 representing a square)
The possible choices are:
c) sin2 x -1 / cos2 x
d) tan2x + sec2x
e) (sec2x + 1)(csc2x + 1)
Of course, I don't need the answer; I need an explanation. Any help is appreciated!