Jawabanmu

2014-03-05T20:31:05+07:00
Cos Z = 20/24 
ΔXYZ ⇒ XZ=24 YZ=20 ⇒ XY = √24²-20² = √176
tan X = sisi depan/sisi samping = 20/√176 = 20√176/176
tan Z = √176/20