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`        If the sum of two unit vectors is a unit vector then find the magnitude of their difference`
2 years ago

Arun
23742 Points
```							Dear Kunal let two vectors are a,b then resultant of sum = (a2 + b2 + 2abcos@)1/2 = 1               (given) a = b = 1          (unit vector)  1+1+2cos@ = 1       cos@ = -1/2           .................1 now resultant of difference = magnitude (a-b) R = (a2 + b2 - 2abcos@)1/2 a = b = 1 , cos@ = -1/2 so R = [ 1+1+1]1/2 = root3
```
2 years ago
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