imo class 12 vector algebra

The angle between vectors with positive dot product is:

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#IMO#Class 12#Mathematics#Vector Algebra#logical-reasoning

The angle between vectors with positive dot product is:

  • A. Obtuse
  • B. Right angle
  • C. Acute
  • D. 180°

Answer: C) Acute

Explanation: cosθ > 0 implies θ is acute.

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