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AP EAMCET202315 May 2023Evening ShiftMathematicsThree Dimensional GeometryActual

If a and b are two vectors such that | a |=| b |= 14 and a b =-7 , then | a b | | a b | =

Options

  1. A7 3
  2. B3
  3. C49 3
  4. D3 7

Correct answer

B. 3

Step-by-step solution

Given, a b =-7 | a || b | =7 = 1 2 = 3 Now, | a b | | a b | = | a || b | | a || b | = = 3

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