Derivative of cos(x^9)

Answer

−9⋅sin(x9)⋅x8-9 \cdot \mathrm{sin}\left(x^{9}\right) \cdot x^{8}
-9*sin(x^9)*x^8

Derivative of cos(x^9)

Rule Used
Chain Rule
Steps
  1. Identify a composite function in cos⁡(x9)\cos(x^9): use the chain rule ddxf(g(x))\frac{d}{dx} f(g(x)) = f'(g(x))·g'(x). The inner derivative is required because a stretch or shift of the input changes how fast the output moves.
  2. Differentiate the outer function, then multiply by the inner derivative.
  3. Final answer: -9⋅s9 \cdot sin(x9x^9)*x8x^8

The derivative of cos(x^9) is -9*sin(x^9)*x^8.

Instant step-by-step solution for cos(x^9)

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Derivative of cos(x^9) = -9*sin(x^9)*x^8 Solve step-by-step for free: https://derivativecalculatorai.com/derivative-of-cosx-minus-to-minus-the-minus-9

How to find the derivative of cos(x^9)

To find the derivative of cos(x^9), we use standard differentiation rules. Our AI-powered calculator breaks down the steps and explains the logic.

Frequently Asked Questions

What is the derivative of cos(x^9)?▼
The derivative of cos(x^9) is -9*sin(x^9)*x^8.
How do you find the derivative of cos(x^9)?▼
Apply the standard differentiation rules — the key rule used here is the Chain Rule. The step-by-step result is -9*sin(x^9)*x^8.
Why is the derivative of cos(x^9) equal to -9*sin(x^9)*x^8?▼
Because differentiation measures how a function changes — applying the rules to cos(x^9) yields -9*sin(x^9)*x^8. See the full step-by-step breakdown above.