If  are Non-coplanar Vectors And  are Reciprocal Vectors, Then        

If  are any three vectors such that 

Let  the value of λ for which the vector  is parallel to the plane containing  

Let  be three unit vectors such that  If the angle between , then the volume of the parallelepiped whose three conterminus edges are  

If  are three non-coplanar, non-zero vectors, then

             is equal to 

If the acute angle that the vector  makes with the plane of the two vectors  is , then 

If  are non-zero and non-collinear vectors, then is equal to

If  is a unit vector such that   

 is equal to 

Let  be three vectors such that  If  be perpendicular to , then the value of l + m + n is   

If  is a unit vector, then  is equal to 

If  are any three non-coplanar vectors, then  is equal to