Question

Please help!!!

Which of the following is an identity?

A. sin^2(x) * cot^2(x) + cos^2(x) * tan^2(x) = 1
B. (1-2sin^2(x))csc^2(x) = 4cos^2(x)-2
C. sin(x) -cos(x) + 1 = tan(x)
D. tan^2(x) + cot^2(x) = 1

***My Answer: B***

Answer 1

this should help
https://en.wikipedia.org/wiki/Identity_%28mathematics%29
http://www.mathsisfun.com/definitions/identity.html

Answer 2

Thank you for the resources! I think now the answer is D.

Answer 3

Now entirely sure though.

Answer 4

lol your welcome

Answer 5

Is the answer D?

Answer 6

Oh it is A my bad

Answer 7

it is A

Answer 8

oh you just said that lol

Answer 9

Hahaha