d/dx (cosx+sinx/cosx-sinx)
I'm having a bit of trouble with trying to prove LHS = RHS (or the other way around for that matter)
I have simplified the LHS to be 2/1-2cosxsinx but how do i get the RHS?
Dear ipokeyou,
1) Do you know the sum-to-product rule?? If not better refer: Sum-to-Product formulas (Proof of these formulas could be found in many basic trignometric books.)
2)
Does this solve your problems?? If not please don't hesitate to reply.
See Complementary Angle Identities: Proofs of trigonometric identities - Wikipedia, the free encyclopedia