Calculation of Derivative.

Keyword Derivative,sec 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} \sec x=\tan x \sec x ・Making above Equation Image is powered by CODECOGS

History ・2010/02/22：Upload.