ive been wrestling with this for an hour and a half, and all ive got it Theta y and Fy. a tree is being supported by cables. the tension in cable AB is 4.2 KN. all it gives me to go on is 2 angles. it 40 deg toward z axis from x axis. and the cable makes an angle of 40 deg with the ground. i found Fy to be -2.7 KN and theta y to be 130 deg. i can even get close to Fx or Fz. if i can get those, finding their respective theta's will be a snap.