## d/dx (cos x)

### The expression d/dx (cos x) represents the derivative of the function cos x with respect to x

The expression d/dx (cos x) represents the derivative of the function cos x with respect to x. To find this derivative, we can use the derivative rules for trigonometric functions.

The derivative of the cosine function, cos x, is equal to the negative sine function, -sin x. So, we can write it as:

d/dx (cos x) = -sin x

This means that the rate of change of the cosine function with respect to x is equal to the negative sine function.

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