関連ワード:  what is the derivative of sinhx    what is the derivative of sinhx and coshx    what is the integral of sinhx    what is the differentiation of sinhx    what is the derivative of sech x    what is the derivative of sech    derivative of sech^2    what is the derivative of sech 2 x    what is the derivative of cosh    what is the derivative of tanhx