VectorHard

Question

The vectors =   and are the adjacent sides of a parallel gram ABCD then the angle between the diagonals is -

Options

A.cos-1
B.π - cos-1
C.cos-1
D.cos-1

Solution

      




Let Angle between is θ
∴   = cos θ
⇒ cos θ =  .
⇒  Acute angle between diagonals = cos-1

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