Given that 
= 0 out of three vectors two are equal in magnitude and the magnitude of third vector is 
times that of either of the two having equal magnitude. Then the angles between vectors are given by
Text Solution
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From polygon law, three vectors having summation zero should form a closed polygon. (Triangle) since the two vectors are having same magnitude and the third vector is 
times that of either of two having equal magnitude. i.e. the triangle should be right angled triangle
Angle between A and B, a = 90º
Angle between B and C, b = 135º
Angle between A and C, g = 135º
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