Question

Trig Identities
Proof: \[\sec^2x-\sec^2y=\tan^2x-\tan^2y\]

Answer 1

I'm not sure which side to start first...

Answer 2

Pythagorean Identities would be handful here:\[\sec^2\theta = \tan^2\theta+1\]

Answer 3

So start at the right hand one...
It would be like this:
(sec^2x-1)-(sec^2y-1)?

Answer 4

Oh and then the one cancels out.

Answer 5

Yep

Answer 6

Oh I think I got it? Thanks for the advice! :)

Answer 7

No problem :)