User:Jason13086

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j 03:21, 22 May 2007 (UTC)

\int \frac{\text{dy}}{\sqrt{y^2+\rho ^2}}=\frac{1}{2}\ln \left[\frac{\sqrt{y^2+\rho ^2}+y}{\sqrt{y^2+\rho ^2}-y}\right]

\int \frac{\text{dy}}{\sqrt{y^2+\rho ^2}}=\ln \left[y+\sqrt{y^2+\rho ^2}\right]

E = \frac{Q}{4 \pi \epsilon _0 z R}\tan ^{-1}\left(\frac{R}{z}\right) \hat{z}

E = \int \frac{dq \hat{z}}{\rho^2+z^2} \text{, } dq = \frac{A}{\rho}\rho d \rho d \phi

\left( \begin{array}{c} \frac{x^2}{2} \\ \frac{x^3}{3} \\ \sin (x) \\ -\cos (x) \\ x \log (x)-x \\ \sinh ^{-1}(x) \end{array} \right)

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