Derivative,Logarithm,Cotangent,Curve.
[1]:オーム社編:『機械工学公式集』,オーム社,pp.20,1960.
・LaTeX: \frac{d}{dx}\left ( \log_{e}\left | \cot x \right | \right )=-\frac{2}{\sin\, 2x} ・Making above Equation Image is powered by CODECOGS
・2010/02/26:Upload.