If Two Out Of The Three Vectors  are Unit Vectors Such That  then The Length Of The Third Vector Is   

Let  be two unit vectors and α be the angle between them, then  is a unit vector, if α =

If  then the angle between  

Let  are two vectors inclined at an angle of 60^o. If  then the angle between   

If  are unit vectors such that  is also a unit vector, then the angle between , is

If  are unit vectors such that 

If  are unit vectors such that  and  then 

If  are unit vectors inclined to x-axis at angles 30^o and 120^o, then  equals

If  are three vectors such that 

Let  be three vectors such that  and  If 

Let  be three unit vectors such that  and  If  makes angles δ, β with  respectively, then  is equal to