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# Differentiate $$\cos \mathit{ax}$$ with respect to $$x$$

### Question

Differentiate $$\cos \mathit{ax}$$ with respect to $$x$$

### Options

A) $$a\sin \mathit{ax}$$

B) $$\frac 1 a\sin \mathit{ax}$$

C) $$-a\sin \mathit{ax}$$

D) $$-\frac 1 a\sin \mathit{ax}$$

### Explanation:

$$y=\cos ax$$
$$\frac{dy}{dx}=-a\sin ax$$

## Dicussion (1)

• $$y=\cos ax$$
$$\frac{dy}{dx}=-a\sin ax$$