Question

Find the derivative of the
cos Vx with respect to
x
​

Answer 1

$\frac{d}{dx} cos \sqrt{x} \\ = - sin \sqrt{x} \frac{d}{dx} \sqrt{x} \\ = - sin \sqrt{x} . \frac{1}{2 \sqrt{x} } \\ = \frac{ - sin \sqrt{x} }{2 \sqrt{x} }$