What is the derivative of cos(9x) ?

The derivative of cos(9x) is -sin(9x)*9

What is the first derivative of cos(9x) ?

The first derivative of cos(9x) is -sin(9x)*9

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derivative of

cos (9 x)

- sin (9 x) \cdot 9

Solution steps

\frac{d}{d x} (cos (9 x))

Apply the chain rule:

- sin (9 x) \frac{d}{d x} (9 x)

= - sin (9 x) \frac{d}{d x} (9 x)

\frac{d}{d x} (9 x) = 9

= - sin (9 x) \cdot 9

y = \frac{x}{x + 3}

\frac{d}{d x} (- a e^{- x})

\frac{\partial ^{2}}{\partial y ^{2}} (x^{2} - e^{y^{2}})

\int_{0}^{\frac{π}{8}} x tan^{2} (2 x) d x

\int \frac{1}{4 u ^{2} + 9 - 41 u} d u

What is the derivative of cos(9x) ?
The derivative of cos(9x) is -sin(9x)*9
What is the first derivative of cos(9x) ?
The first derivative of cos(9x) is -sin(9x)*9