関連ワード:  derivative of cosh 2x    derivative of sinh 2x    differentiation of cosh 2x    derivative of sinh 2x 5    derivative of cosh 2    derivative of cosh^(2)3x    derivative of cosh 2 t    derivative of (cosh)^2(5x)    derivative of cosh 3 2x 3    derivative of cosh 1 2x