What is the derivative of cos(8θ) ?

The derivative of cos(8θ) is -sin(8θ)*8

What is the first derivative of cos(8θ) ?

The first derivative of cos(8θ) is -sin(8θ)*8

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derivative of

cos (8 θ)

- sin (8 θ) \cdot 8

Solution steps

\frac{d}{d θ} (cos (8 θ))

Apply the chain rule:

- sin (8 θ) \frac{d}{d θ} (8 θ)

= - sin (8 θ) \frac{d}{d θ} (8 θ)

\frac{d}{d θ} (8 θ) = 8

= - sin (8 θ) \cdot 8

What is the derivative of cos(8θ) ?
The derivative of cos(8θ) is -sin(8θ)*8
What is the first derivative of cos(8θ) ?
The first derivative of cos(8θ) is -sin(8θ)*8