Hi friend,

 

1.  (a+b)^n 

      If a and b are constants then derivative is 0. Otherwise, please specify

      about a and b.

 

 

2.   ( sin [x] )^n

      This is a discontinous function due to which it is not differentiable.

      You can check by making a graph of sin[x]. So its nth power is also

       discontinous.