Calculation of Derivative.

Keyword Derivative,Trigonometric function,Inverse trigonometric functions,tangent curve.

Reference [1]：オーム社編：『機械工学公式集』,オーム社,pp.20,1960.

Remarks ・LaTeX： \frac{d}{dx}\textup{tan}^{-1}x=\frac{1}{1+x^{2}} ・Making above Equation Image is powered by CODECOGS

History ・2010/02/23：Upload.