Anyone knows how to solve Q2?

1. In ABC, A=34 16', a=9 and c=12. Find the two possible values of b.

2. A triangle ABC lies on a horozontal plane with X, Y and Z vertically above A,B and C respectively. M is the mid-point of YZ, AB=5cm, BC=6cm, XA=YB=ZC=8cm, and ABC=90 . Find the angle between

a) the line Am and the plane ABC

b) the line AB and the line XC

Answer:

1. 15.9, 3.97

2.

a) 53 55'

b) 63 26'