Help is need to solve a differential matrix equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg13524] Help is need to solve a differential matrix equation*From*: "L L Cheng" <eeacheng at cityu.edu.hk>*Date*: Fri, 31 Jul 1998 04:33:35 -0400*Organization*: City University of Hong Kong*Sender*: owner-wri-mathgroup at wolfram.com

I have tried to use Mathematica to solve a matrix as below: X' = (A + B(t))X for all t >= t0, where A = {{0, 1},{-1,0}} and B(t) = {{0,0}, {0, 2/t}}, the solution of the equation is (1/t)sin t and 1/t cos t. I hope some one can give some idea or help to solve this equation. Thanks. Best regards, LL Cheng eeacheng at cityu.edu.hk phone : 852-27887755 fax : 852-27887791