**TI86** Program file dated 12/08/98, 22:45( VecAnglvoVo-Enter (A,B)o-Enter A: /3Ao-Enter B: /3Boo-Enter (C,D)o-Enter C: /3Co-Enter D: /3DooD0/D0/3A/3BoD0/D0/3C/3Doo3Ap3C`3Bp3D 3Eo3AJ`3BJ 3Uo3CJ`3DJ 3Vo3Eq3Up3V 3To3TpD180qB 3To-T=/3TooG