Force vector A = 45i kN Force vector B = xi + yj kN Force vector B has a magnitude of 60 kN and both of its components, along x, and y axis, are positive, the resultant of force vectors A and B is...

Force vector A = 45i kN

Force vector B = xi + yj kN

Force vector B has a magnitude of 60 kN and both of its components, along x, and y axis, are positive, the resultant of force vectors A and B is force vector C having a magnitude of 80 kN.

1. What is the value of angle between vector A and C? Express your answer in unit of degrees.

2. What is the value of angle between vector B and C? Express your answer in unit of degrees.

3.  What is the scalar triple product of vectors A, B, and C?