represent Respectively  where ABC is A Triangle. Then, 

Let  be three vectors having magnitudes 1, 1 and 2 respectively such that  then the acute angle between 

If 

The length of the longer diagonal of the parallelogram constructed on  if it is given that  and 

If the vectors  make an obtuse angle for any x Ïµ (0, ∞), then c belongs to 

The vector  is rotated through an angle θ and doubled in magnitude, then it becomes  The value of x are

If  are unit vectors such that the vector  is perpendicular to  is perpendicular to  then the angle between  is

If G is the centroid of âˆ†ABC such that  are inclined at on obtuse angle, then 

A vector of magnitude 4 which is equally inclined to the vectors  is 

Unit vector equality inclined to the vectors 

If a, b, c are the p^th, q^th and r^th terms of a G.P., then the angle between the vector  and