if two forces of the same magnitude F are acting at an angle of 120 degree with each other the magnitude of their resultant will be
Fr=2Fcos120°2=2F⋅0.5=F.F_r=2Fcos\frac{120°}{2}=2F\cdot 0.5=F.Fr=2Fcos2120°=2F⋅0.5=F.
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