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Math Help - related rates... check

  1. #1
    Junior Member
    Joined
    Jan 2010
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    62

    related rates... check

    a point is moving along the graph of the given function such that dx/dt is 2 cm/sec. find dy/dt for the given values of x

    y=cosx

    i ended up changing this to dy/dt=-sinx*2


    x = pi/6 -> dy/dt = -1
    x = pi/4 -> dy/dt = -squareroot(2)
    x = pi/3 -> dy/dt = -squareroot(3)

    sorry if this is a little messy jw if my awnsers are correct for each x value
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  2. #2
    Senior Member
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    That looks correct.
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