deriv of cosx
sinx
The derivative of cos(x) can be found using the chain rule. The chain rule states that if we have a function inside another function, we need to take the derivative of the outer function, evaluate it at the inner function, and then multiply by the derivative of the inner function. In this case, we have the function cos(x) inside the function f(x) = cos(x). So, we can find the derivative using the chain rule as follows:
f'(x) = -sin(x)
Therefore, the derivative of cos(x) is -sin(x).
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