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Math Help - differentiation rules #1

  1. #1
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    differentiation rules #1

    I need help on these problems. Thanks a lot.
    1. y= ln squareroot 1 + t^2
    2a. y= s/(1+2s)
    2b. y= e^-u cos u
    Last edited by mr fantastic; October 5th 2009 at 03:33 AM. Reason: Re-titled post
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  2. #2
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    1. y= ln squareroot 1 + t^2

    \ln{\sqrt{1+t^2}} = \frac{1}{2} \ln(1+t^2)

    \frac{d}{dt}[\ln{u}] = \frac{1}{u} \cdot \frac{du}{dt}


    2a. y= s/(1+2s)

    use the quotient rule


    2b. y= e^-u cos u

    use the product rule and chain rule
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