Question

If two out of the three vectors  are unit vectors such that  then the length of the third vector is   

Solution

Correct option is

1

 

Let   

We have,  

          

  

  

.  

 

SIMILAR QUESTIONS

Q1

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

Q2

If  then the angle between  

Q3

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

Q4

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

Q5

If  are unit vectors such that 

Q6

If  are unit vectors such that  and  then 

Q7

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

Q8

If  are three vectors such that 

Q9

Let  be three vectors such that  and  If 

Q10

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