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

Create a free account to view solution

View Solution Free
Topic: Vector·Practice all Vector questions

More Vector Questions

If are two non collinear vectors and a, b, c represent the sides of aᐃABC satisfying (a - b) + (b - c) + (c - a) =...If |.| = 3 and | × | = 4, then the angle between and is-...If the vector and are mutually perpendicular, then × { × { × ( × )}} is equal to -...If and are unit vectors and θ is the acute angle between them, then is a unit vector for...For three unit vectors $\overrightarrow{a},\overrightarrow{b},\overrightarrow{c}$ satisfying$|\overrightarrow{a} - \over...