Question: how to get Sin[n*Pi]=0 (n integer)

*To*: mathgroup at christensen.cybernetics.net*Subject*: [mg1946] Question: how to get Sin[n*Pi]=0 (n integer)*From*: izovko at dominis.phy.hr (Ilija I Zovko)*Date*: Sat, 26 Aug 1995 00:08:53 -0400*Organization*: Ruder Boskovic Inst., Zagreb, CROATIA

Hi, How can one tell Mathematica to simplify Sin[n Pi]=0 or Cos[n Pi]=(-1)^n and similar kind of stuff. Also, how does one tell it "A" & "B" are matrices so it doesn't commute them (AB.not equal.BA). Thanks. ) -- Ilija I Zovko izovko at phy.hr