Let  be A Unit Vector Perpendicular To Unit Vectors  and If The Angle Between  is α, Then  is

 is a unit vector such that 

 then a unit vector normal to the vectors  

A unit vector perpendicular to both 

If  are the position vectors of the vertices A, B, C of a triangleABC, then the area of triangle ABC is  

If , then the length of the perpendicular from A to the line BC is 

The perpendicular distance of the point  from the line joining 

If the diagonals of a parallelogram are represented by the vectors , then its area in square units is

If  are three vectors such that  then

Let  be unit vectors such that . Which one of the following is correct?

If the vectors  are such that  form a right handed system, then  is