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; Oct 5th 2009 at 03:33 AM. Reason: Re-titled post
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1. y= ln squareroot 1 + t^2 $\displaystyle \ln{\sqrt{1+t^2}} = \frac{1}{2} \ln(1+t^2)$ $\displaystyle \frac{d}{dt}[\ln{u}] = \frac{1}{u} \cdot \frac{du}{dt}$ 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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