What is the derivative of cos(15x) ?

The derivative of cos(15x) is -sin(15x)*15

What is the first derivative of cos(15x) ?

The first derivative of cos(15x) is -sin(15x)*15

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\frac{d}{d x} (cos (15 x))

- sin (15 x) \cdot 15

Solution steps

\frac{d}{d x} (cos (15 x))

Apply the chain rule:

- sin (15 x) \frac{d}{d x} (15 x)

= - sin (15 x) \frac{d}{d x} (15 x)

\frac{d}{d x} (15 x) = 15

= - sin (15 x) \cdot 15

What is the derivative of cos(15x) ?
The derivative of cos(15x) is -sin(15x)*15
What is the first derivative of cos(15x) ?
The first derivative of cos(15x) is -sin(15x)*15