How does one verify (secx-cosx)^2=tan^2x-sin^2x(secx−cosx)2=tan2x−sin2x?
(secx-cosx)^2=tan^2x-sin^2x(secx−cosx)2=tan2x−sin2x
1 Answer
Apr 23, 2018
See below.
Explanation:
We'll leave the right side alone and attempt to get the left side to match it.
Expand the left side:
Rewrite, splitting up the
Recall the following identities:
So, we get