What is the derivative of-cos(3x) ?

The derivative of-cos(3x) is 3sin(3x)

What is the first derivative of-cos(3x) ?

The first derivative of-cos(3x) is 3sin(3x)

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derivative of

- cos (3 x)

3 sin (3 x)

Solution steps

\frac{d}{d x} (- cos (3 x))

Take the constant out:

(a \cdot f)^{'} = a \cdot f^{'}

= - \frac{d}{d x} (cos (3 x))

Apply the chain rule:

- sin (3 x) \frac{d}{d x} (3 x)

= - sin (3 x) \frac{d}{d x} (3 x)

\frac{d}{d x} (3 x) = 3

= - (- sin (3 x) \cdot 3)

Simplify

= 3 sin (3 x)

f (x) = \frac{1}{8 x}, at x = 9

\frac{\partial}{\partial x} (2 x^{3} y^{2} + 2 y + 4 x)

\int x^{3} x^{4} + 1 d x

\frac{d ^{2} y}{d x ^{2}} + a^{2} \cdot y - e^{b - x} - 1 = 0

\frac{1}{y} d x - \frac{x}{( ln ( x ) ) ^{3}} d y = 0

What is the derivative of-cos(3x) ?
The derivative of-cos(3x) is 3sin(3x)
What is the first derivative of-cos(3x) ?
The first derivative of-cos(3x) is 3sin(3x)