Question

given that sum of vector A+B+C=0 out of three vector two are equal in magnitude and third vector is root2 times of either of the two having equal magnitude.find angle between vectors.​

Answer 1

Answer: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  

2  times that of either of two having equal magnitude, i.e., the triangle should be right angled triangle.

Angle between A and B, α=90  

Angle between B and C, β=135  

Angle between A and C, γ=135  

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