Find the angle between forces of magnitude 7N and 4N if their resultant has a magnitude of 9N.

Majwin338

1 year ago

The angle used in the Parallelogram law of vector should have been Cos(180-∆), where ∆ is the angle between the 2 forces and (180-∆) is the supplementary angle of the Parallelogram thus formed.
In short the final answer should have been
180-73.4 = 106.6