What is the derivative of cos^8(x) ?

The derivative of cos^8(x) is -8cos^7(x)sin(x)

What is the first derivative of cos^8(x) ?

The first derivative of cos^8(x) is -8cos^7(x)sin(x)

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derivative of

cos^{8} (x)

- 8 cos^{7} (x) sin (x)

Solution steps

\frac{d}{d x} (cos^{8} (x))

Apply the chain rule:

8 (cos (x))^{7} \frac{d}{d x} (cos (x))

= 8 (cos (x))^{7} \frac{d}{d x} (cos (x))

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

= 8 (cos (x))^{7} (- sin (x))

Simplify

= - 8 cos^{7} (x) sin (x)

What is the derivative of cos^8(x) ?
The derivative of cos^8(x) is -8cos^7(x)sin(x)
What is the first derivative of cos^8(x) ?
The first derivative of cos^8(x) is -8cos^7(x)sin(x)