Jawabanmu

2014-02-28T07:42:40+07:00
Tan a = -8/15 =8/-15
sin a > 0 
8/17 >0
a. cos a = -15/17
b. sec a = 1/cos a = 17/-15
c. (sin a)(cos a) = (8/17)(-15/17) = -120/289
d. cosec a/ cotan a 
   = 17/8  dibagi -15/8
   = -255/64
kak coba di jelaskan secara rinci la,,, aq kurang paham