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Math Help - implicit help

  1. #1
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    implicit help

    can someone help me with this problem?

    Find as a function of if .

    i know it should be easy but i must be doing something stupid incorrectly because the answer i got was wrong
    Last edited by purplegirl1818; October 28th 2008 at 05:47 PM.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by purplegirl1818 View Post
    can someone help me with this problem?

    Find as a function of if .

    i know it should be easy but i must be doing something stupid incorrectly because the answer i got was wrong
    just differentiate both sides. the left side becomes \frac {d^2x}{dt^2} and the right side becomes \text{derivative of}(9x \cos x)~\frac {dx}{dt}

    Quote Originally Posted by purplegirl1818 View Post
    please?
    do not bump. it is against the rules
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