hi, I need help with this problem

(2sin^2x-1)^2 / sin^4x-cos^4x = 1-2cos^2x

Correct me if I am wrong, your equation is:

There are several identities to keep in mind and it falls into place.

Note that



and



That last one is the same as on the right side of the equation, huh? :)

Thanks...

Um... did you really understood the last two posts! :confused:

not really? =/

If what you asked is really what we understood, then the question you asked is not a good proof.

.. may I ask?. ahm, can u solve, x cube plus x squared minus 7x+5 divided by x+3?. can u get it?.