Differentiate the functions with respect to x
`cos(sqrt(x))`

Explanation

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

=>`-sin(sqrt(x))**d(x^frac{1}{2})/dx`

=>`-sin(sqrt(x))**1/2x^frac{-1}{2}`


=>`-sin(sqrt(x))//2sqrt(x)`