(\partial)/(\partial x)(cos(kx))

解答

\frac{\partial}{\partial x} (cos (k x))

- sin (k x) k

求解步骤

\frac{\partial}{\partial x} (cos (k x))

使用连锁律:

- sin (k x) \frac{\partial}{\partial x} (k x)

= - sin (k x) \frac{\partial}{\partial x} (k x)

\frac{\partial}{\partial x} (k x) = k

= - sin (k x) k

s l o p e (- 4, 3), (- 1, - 6)

\int x^{2} 4 - x^{2} d x

\int (z + 1) e^{3 z} d z

t an g e n t y^{3} + 3 y^{2} = x^{4} - 3 x^{2}, (- 2, 1)

\int 3 x (x - 2) d x