Jawabanmu

2014-06-06T22:14:40+07:00
1. cosA ad di kuadran 2.
cosA = sa/mi = 12/13
samping = 12. miring = 13. jadi depan = akar dari (13^ - 12^) = 5

Sin (180-A) = Sin A = de/mi = 5/13 (c)