If ` vec a\ a n d\ vec b` be two unit vectors and `theta` is the angle between them. Then ` vec a+ vec b\ ` is an unit vector, if `theta=` `pi/2` b. `(2pi)/3` c. `pi/4` d. `pi/3`

If vec a and vec b are two unit vectors and theta is the angle between them, then |vec a - vec b| is equal to ______________

Let veca and vec b be two unit vectors such that angle between them is 60^(@) .Then |veca - vec b| is equal to

A and B are two vectors and theta is the angle between them, if |vecAxxvecB|= sqrt3 (vecA. vec B) the value of theta is :

If vec a , a n d vec b are unit vectors , then find the greatest value of | vec a+ vec b|+| vec a- vec b|dot

If theta is the angle between two vectors vec a and vec b , then veca. b ge 0 only when

If vec aa n d vec b are two vectors of magnitude 1 inclined at 120^0 , then find the angle between vec ba n d vec b- vec adot

If vec aa n d vec b are two unit vectors and theta is the angle between them, then the unit vector along the angular bisector of vec a and vec b will be given by a. ( vec a- vec b)/(cos(theta//2)) b. ( vec a+ vec b)/(2cos(theta//2)) c. ( vec a- vec b)/(2cos(theta//2)) d. none of these

If vec a and vec b be two unit vectors such that vec a+ vec b is also a unit vector, then find the angle between vec a and vec b

If theta is the angle between the unit vectors vec a and vec b , then prove that sin (theta)/(2) = 1/2|vec a - vec b|