A, B, C = Angles        a, b, c = Distances

           a              b              a

  sin A = ---  , cos A = ---  , tan A = ---

           c              c              b

  Area = (ab)/2

 1.     Given a and b, find A, B and c

          a                           b²

  tan A= --- = cotB, c=√a²+b² = a√1+ ---

          b                           a²

 2.      Given a and b, find A, B and b

          a                                a²

  sin A= --- = cosB, b=√(c+a)(c-a) = c√1- ---

          c                                c²

 3.      Given A and a, find B, b and c

                           a

  B = 90^o-A, b=a cotA, c= ---

                          sinA

 4.      Given A and b, find B, a and c

                         b

  B=90^o-A, a=b tanA, c= ---

                        cosA

 5.      Given A and c, find B, a and b

  B=90^o-A, a=c sinA, b=c cosA