Question

Which of the following are identities? Check all that apply.

A. cot x = 1/ tan x
B. sec x = 1/ csc x
C. tan x = cos x/ sin x
D. csc x = 1/ sin x

***My Answer: C,D***
I know that D is an identity and that B is not. What about A and C?

Answer 1

Now that I think about it more, I think that C is not an identity and A is an identity.

Answer 2

So the answer would be A, D right?

Answer 3

Yep the answers are A and D