How to write this using MATLAB without using the Bessel function?

19The Bessel functions Jn are defined by Jn(x) = cos(x sin -n0) d Establish that IJn (x)lS. a. It is known that In+1 (x) = 2nx_1 Jn (x)-In-1(x) Use this recurrence relation to compute o(1) 1(1),..., /20(1), starting from known values J0(1) 0.76519 76865 and Ji(1) 0.44005 05837 Account for the fact that the inequality |Jn (x) Sl is violated