関連ワード:  derivative of 3 cos x    derivative of 3 cos x 2    derivative of 3 3cos x    derivative of cos 3 x 4    derivative of cos 3 x 1    differentiation of 3 cos x    antiderivative of 3 cos x    derivative of 3 cos log x    derivative of sin 3 cos x 2 ))    derivative of (x^3-cos x)^5