Knowing that the tension in cable AC is 294 lb, answer the following questions.
The horizontal distance between B and A is 6 feet and the vertical distance between B and A is 4.5 feet. Vector P acts vertically down from point A. 2 cables from point A are pinned at points C and D. The coordinates, in feet, of points A, B, C, and D are point A (6, 4.5, 0), point B (0, 0, 0), point C (0, 6.5, 3), point D (0, 7.5, negative 6).
Determine the smallest angle between cable AC and the boom AB.
The smallest angle is °.