Understanding the Derivative of the Cosine Function: Simplifying the Derivative Rule for cos(x) to -sin(x)

d/dx [cos x]

To find the derivative of the function f(x) = cos(x), we can use the derivative rules

To find the derivative of the function f(x) = cos(x), we can use the derivative rules.

The derivative of the cosine function, denoted as cos(x), is given by:

d/dx [cos(x)] = -sin(x)

Therefore, the derivative of cos(x) is -sin(x).

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