Jawabanmu

2014-06-06T08:11:16+07:00
Tan (x - π/6) = -1
       x - π/6 = 3π/4 + k.π
               x  = 11π/12 + k . π
               x = 11π/12 , 23π/12 ,35π/12
       x - π/6 = 21π/12 + k.π
               x = 23π/12 + k.π
               x = 23π/12 , 35π/12
HP {11π/12 , 23π/12 , 35π/12}