If `vec a,vec b,vec c` are three vectors such that `vec a=vec b+vec c` and the angle between `vec b and vec c` is `pi/2,` then

If vec a,vec b,vec c are unit vectors such that vec a*vec b=0=vec a*vec c and the angle between vec b and vec c is pi/3, then the value of |vec a xxvec b-vec a xxvec c| is 1/2 b.1 c.2 d.none of these

If vec a , vec b , vec c are unit vectors such that vec a. vec b=0= vec a. vec c and the angle between vec b and vec c is pi/3, then find the value of | vec axx vec b- vec axx vec c| .

If vec a , vec b , vec c are unit vectors such that vec a. vec b=0= vec a. vec c and the angle between vec b and vec c is pi/3, then find the value of | vec axx vec b- vec axx vec c| .

Let vec a,vec b,vec c are the three vectors such that |vec a|=|vec b|=|vec c|=2 and angle between vec a and vec b is (pi)/(3),vec b and vec c and (pi)/(3) and vec a and vec c(pi)/(3). If vec a,vec b and vec c are sides of parallelogram

If vec a,vec b and vec c are three unit vectors such that vec a*vec b=vec a*vec c=0 and angle between vec b and vec c is (pi)/(6) prove that vec a=+-2(vec b xxvec c)

If vec a, vec b, vec c are three vectors such that vec a + vec b + vec c = vec 0 and |vec a| = 2, |vec b| = 3, |vec c| = 5 , then the value of vec a . vec b + vec b . vec c + vec c . vec a =

If vec a ,\ vec b ,\ vec c are three vectors such that vec a. vec b= vec a.\ vec c and vec a\ xx\ vec b= vec a\ xx\ vec c ,\ vec a\ !=0 , then show that vec b= vec c .

If vec(a) , vec(b) and vec (c ) are three unit vectors such that vec(a).vec(b) = vec(a).vec (c )=0 and angle between vec(b) and vec (c ) is pi/6 , prove that , vec (a) = pm 2 ( vec(b) xx vec(c ))

If vec a + vec b = vec c and | vec a | = | vec b | = | vec c | find the angle between vec a and vec b