If `vec a` and `vec b` are unit vectors making an angle a with each other,such that `alpha in(0,pi)` and `|vec a+2vec b|<5`, then `alpha` lies in the interval

If vec a and vec b are unit vectors find the angle between vec a+vec b and vec a-vec b

alpha and beta are unit vectors inclined to each other at an angle alpha,alpha in(0,pi) and |vec a+vec b|<1, Then alpha in

If vec a and vec b are non-collinear vectors,then the value of x for which vectors vec alpha=(x-2)vec a+vec b and vec beta=(3+2x)vec a-2vec b are collinear,is given by

If vec a,vec b and vec c are three units vectors equally inclined to each other at an angle alpha. Then the angle between vec a and plane of vec b and vec c is

If vec a and vec b are two unit vectors and the angle between them is 60^@ then ((1+vec a.vec b))/((1-vec a.vec b)) is

If vec aa n d vec b are two vectors and angle between them is theta, then | vec axx vec b|^2+( vec adot vec b)^2=| vec a|^2| vec b|^2 | vec axx vec b|=( vec adot vec b),iftheta=pi//4 vec axx vec b=( vec adot vec b) hat n ,(w h e r e hat n is unit vector,) if theta=pi//4 ( vec axx vec b)dot( vec a+ vec b)=0

If vec a and vec b are unit Vectors,then what is the angle between vec a and vec b so that sqrt(2)vec a-vec b is a unit vector?

if vec a,vec b and vec c are there mutually perpendicular unit vectors and vec a ia a unit vector make equal angles which vec a,vec b and vec c then find the value of |vec a+vec b+vec c+vec d|^(2)

If vec a and vec b are unit vectors and 60^(@) is the angle between them,then (2vec a-3vec b)*(4vec a+vec b) equals

vec a and vec b are two given unit vectors at right angle.The unit vector equally inclined with vec a,vec b and vec a xxvec b will be