Two equal forces have the square of their resultant equal to three times their product. Find the angle between them. (Ans= 60 degree) Please help! :O Share with your friends Share 32 Himanshu answered this Let the equal forces be F. 97 View Full Answer Saksham Kaushal answered this If F1 and F2 are the forces acting at a point at an angle between them, their resultant is given by F =( F1^2 + F2^2 + 2F1F2 cos of the angle)^1/2 Hence F^2= 2F^2+2F^2Cosx= 2F^2( 1-cosx) Therefore 1-cosx= i/2 And cosx = 1/2 Therefore x= 60 degreesThumbs up!!! 1