Question

What is the derivative of -cos(x)? *​

Answer 1

Answer:

Why do you think nobody believes Kitty stories / experience about the fairy land

Explanation:

Mark as brainleast.

Answer 2

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$\frac{dy}{dx} = \frac{d \: ( - cos \: x)}{dx} \\ \: \: \: \: \: \: \: = - \frac{d \: \: cos \: x}{dx} \\ \: \: \: \: = - ( - sin \: x) \\ \: \: \: \: \: = \: sin \: x$