If `vec(a),vec(b),vec(c)` are three non-coplanar vectors such that `vec(a)xx(vec(b)xxvec(c))=(b+c)/(sqrt(2)),` then the angle between `vec(a)andvec(b)" is "`

If vec a,vec b and vec c are non-coplanar unit vectors such that vec a xx(vec b xxvec c)=(vec b+vec c)/(sqrt(2)), then the angle between vec a and vec b is a.3 pi/4b. pi/4 c.pi/2d. pi

If vec(a),vec(b),vec(c) are coplanar vectors, show that (vec(a)xxvec(b))xx(vec(c)xxvec(d))=vec(0)

The unit vectors vec(a),vec(b) and vec( c ) are not coplanar. If vec(a)xx(vec(b)xx vec( c ))=(1)/(sqrt(2))(b+c) then the angle between vec(a) and vec(b) is ………………

If vec(a)andvec(b) are unit vectors such that [vec(a),vec(b),vec(a)xxvec(b)]=(pi)/(4)," then the angle between "vec(a)andvec(b)" is "

If vec a, vec b and vec c are non coplanar unit vectors such that vec a xx (vec b xx vec c) = (vec b + vec c)/sqrt2 , then

If |vec(a)xxvec(b)|=vec(a).vec(b), then angle between the vector vec(a)andvec(b) is ……………..

Let vec(a),vec(b) and vec( c ) are three unit vectors such that vec(a)xx(vec(b)xx vec( c ))=(sqrt(3))/(2)(vec(b)+vec( c )) . If the vectors vec(b) and vec( c ) are not parallel then the angle between vec(a) and vec(b) is ……….