What is the derivative of cos(20x) ?

The derivative of cos(20x) is -sin(20x)*20

What is the first derivative of cos(20x) ?

The first derivative of cos(20x) is -sin(20x)*20

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\frac{d}{d x} (cos (20 x))

- sin (20 x) \cdot 20

Solution steps

\frac{d}{d x} (cos (20 x))

Apply the chain rule:

- sin (20 x) \frac{d}{d x} (20 x)

= - sin (20 x) \frac{d}{d x} (20 x)

\frac{d}{d x} (20 x) = 20

= - sin (20 x) \cdot 20

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What is the derivative of cos(20x) ?
The derivative of cos(20x) is -sin(20x)*20
What is the first derivative of cos(20x) ?
The first derivative of cos(20x) is -sin(20x)*20