# How do you use the chain rule to differentiate #-cos(4x+9)#?

Therefore the answer is,

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To differentiate -cos(4x+9) using the chain rule:

- Identify the outer function as cosine and the inner function as 4x+9.
- Take the derivative of the outer function, which is -sin(4x+9).
- Multiply this by the derivative of the inner function, which is 4.
- Combine the results to get the final derivative: -4sin(4x+9).

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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