Maths-
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Easy

Question

If a with bar on top equals negative ı with bar on top plus ȷ with bar on top plus 2 k with bar on top comma b with bar on top equals 2 l with bar on top plus ȷ with bar on top minus k with bar on top comma c with bar on top equals negative 2 l with bar on top plus ȷ with bar on top plus 3 k with bar on top then the angle between 2 a with not stretchy bar on top minus c with not stretchy bar on top and  is

  1. fraction numerator pi over denominator 4 end fraction    
  2. fraction numerator pi over denominator 3 end fraction    
  3. fraction numerator pi over denominator 2 end fraction    
  4. fraction numerator 3 pi over denominator 2 end fraction    

The correct answer is: fraction numerator pi over denominator 3 end fraction

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