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AP EAMCET20225 Jul 2022Evening ShiftPhysicsMathematics in PhysicsActual

The dot product of unit vectors n ₁ and n ₂ that are parallel to 5 i +12 j and 3 i +4 j respectively is

Options

  1. A63 65
  2. B63
  3. C63 4225
  4. D63 845

Correct answer

A. 63 65

Step-by-step solution

We have, n ₁ n ₂= 1 13 (5 i +12 j ) 1 5 (3 i +4 j )= 1 65 (15+48)= 63 65

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