Question

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

Answer 1

\[A. \cot^2x+\csc^2x=1\]
\[B. \tan^2x=\sec^2x-1\]
\[C. \sin^2x=1-\cos^2x\]
\[D. \sin^2x-\cos^2x=1\]

Answer 2

I know for sure it is not D.

Answer 3

@welshfella

Answer 4

Do you know the Pythagorean Identities?

Answer 5

I do the ones that I think are right is B and D but I am not too sure

Answer 6

B & C

Answer 7

oh okay thank you.
so D is not correct

Answer 8

\[\sin ^2+\cos ^2=1\]

Answer 9

no

Answer 10

aorry I did not mean to say D lol

Answer 11

Thank you