Derivative of cos(9x)
Answer
-9*sin(9*x)
Derivative of cos(9x)
- Rule Used
- Chain Rule
- Steps
- Identify a composite function in : use the chain rule = f'(g(x))·g'(x). The inner derivative is required because a stretch or shift of the input changes how fast the output moves.
- Differentiate the outer function, then multiply by the inner derivative.
- Final answer: -in()
The derivative of cos(9*x) is -9*sin(9*x).
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Derivative of cos(9x) = -9*sin(9*x) Solve step-by-step for free: https://derivativecalculatorai.com/derivative-of-cos9x
How to find the derivative of cos(9x)
To find the derivative of cos(9x), we use standard differentiation rules. Our AI-powered calculator breaks down the steps and explains the logic.
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Frequently Asked Questions
What is the derivative of cos(9x)?▼
The derivative of cos(9x) is -9*sin(9*x).
How do you find the derivative of cos(9x)?▼
Apply the standard differentiation rules — the key rule used here is the Chain Rule. The step-by-step result is -9*sin(9*x).
Why is the derivative of cos(9x) equal to -9*sin(9*x)?▼
Because differentiation measures how a function changes — applying the rules to cos(9x) yields -9*sin(9*x). See the full step-by-step breakdown above.