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## Homework Statement

if |A+B| = |A| = |B|

then what is the angle between A and B?

A and B are vectors.

edit: assume they are non-zero vectors

## The Attempt at a Solution

the only way this is possible is if the angle is 60degrees right? equilateral triangle.

but the ans given is 120 degrees. why?

if it is 120 degrees, then it would be isosceles triangle and the magnitude of A+B won't be equal to A or B anymore.

so is the ans given wrong?

thanks!

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