Jawaban:

          Sin  a = 1/3                  

           +=

          = 9 – 1

          = 8

          X= 2

Jadi      cos a = 2/3                C                                               C                                              

              Tan a = 1/2                                    3                                            3

              Sin C = 2/3                                                                 1                                                                                                                                                                     

              Cos C = 1/3                     B                              A             B                              A

              Cot C = 1/2                                                                              2