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-   -   Trigonometry PROVING problems (https://www.askmehelpdesk.com/showthread.php?t=465981)

  • Apr 20, 2010, 04:16 PM
    nata1618
    trigonometry PROVING problems
    hi, I need help with this problem

    (2sin^2x-1)^2 / sin^4x-cos^4x = 1-2cos^2x
  • Apr 20, 2010, 04:53 PM
    InfoJunkie4Life

    Correct me if I am wrong, your equation is:

  • Apr 21, 2010, 02:29 AM
    galactus

    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? :)
  • Apr 21, 2010, 04:04 PM
    nata1618

    Thanks...
  • Apr 22, 2010, 10:25 AM
    Unknown008

    Um... did you really understood the last two posts! :confused:
  • Apr 22, 2010, 04:14 PM
    nata1618

    not really? =/
  • Apr 23, 2010, 10:52 PM
    Unknown008

    If what you asked is really what we understood, then the question you asked is not a good proof.
  • Aug 9, 2010, 12:06 PM
    maburichoii04
    .. may I ask?. ahm, can u solve, x cube plus x squared minus 7x+5 divided by x+3?. can u get it?.

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