Total no. of functions

Let f:A rarr B be any function where A is set containing the positive integral solution of the inequality cos ec^(-1)(cos ec2)

Total number of functional groups present in following compound:

Total number of functional groups in following compound is:

The total number of functions from A to itself is 256, then n(A)=

The total number of functions from A to itself is 256, then n(A)=

The total number of functions from A to itself is 256, then n(A)=

Let A and B be any two sets such that n(B)=Pn(A)=q then the total number of functions f:A rarr B is equal to