If a, b and c are unit vectors then |a-b|^2+|b-c|^2+|c-a|^2 does not exceed.

If veca, vecb, vecc are unit vectors, then |veca-vecb|^2+|vecb-vecc|^2+|vecc-veca|^2 does not exceed (A) 4 (B) 9 (C) 8 (D) 6

If veca, vecb, vecc are unit vectors, then |veca-vecb|^2+|vecb-vecc|^2+|vecc^2-veca^2|^2 does not exceed (A) 4 (B) 9 (C) 8 (D) 6

If hat a , hat b ,a n d hat c are unit vectors, then | hat a+hat b|^2+| hat b- hat c|^2+| hat c- hat a|^2 does not exceed

If a, b and c are non-collinear unit vectors also b, c are non-collinear and 2atimes(btimesc)=b+c , then

If veca, vecb, vec c are unit vectors, then the value of |veca-2vecb|^(2)+|vecb-2vec c|^(2)+|vec c-2 vec a|^(2) does not exceed to : (a) 9 (b) 12 (c) 18 (d) 21

If vec a , vec b , vec c are unit vector, prove that | vec a- vec b|^2+| vec b- vec c|^2+| vec c- vec a|^2lt=9.

Let a , b and c be three unit vectors out of which vectors b and c are non -parallel. If alpha " and " beta are the angles which vector a makes with vectors b and c respectively and axx (b xx c) = (1)/(2) b, Then |alpha -beta| is equal to

If a,b and c are non-coplanar vectors, prove that 3a-7b-4c, 3a-2b+c and a+b+2c are coplanar.

a, b, c are three vectors, such that a+b+c=0 |a|=1, |b|=2, |c|=3, then a*b+b*c+c*a is equal to

If a,b and c are three non-zero vectors such that no two of these are collinear. If the vector a+2b is collinear with c and b+3c is collinear with a( lamda being some non-zero scalar), then a+2b+6c is equal to