" 14.If "vec a*vec b=vec a*vec c" and "vec a timesvec b=vec a timesvec c" and "vec a!=0," then "

vec i*(vec i timesvec i)=

If vec adot vec b= vec adot vec c\ a n d\ vec axx vec b= vec axx vec c ,\ vec a!=0, then vec b= vec c b. vec b=0 c. vec b+ vec c=0 d. none of these

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 .

7.Let vec a,vec b and vec c be three unit vectors such that vec a+vec b+vec c=vec 0 .If lambda=vec a*vec b+vec b*vec c+vec c*vec a , vec d=vec a timesvec b+vec b timesvec c+vec c timesvec a ,then the ordered pair (lambda,vec d) is equal to , 1) (-(3)/(2),3vec c timesvec b) 2) ((3)/(2),3vec a timesvec c) 3) (-(3)/(2),3vec a timesvec b) 4) ((3)/(2),3vec b timesvec c)

Solve (vec a timesvec a)*vec b

If vec a+vec b+vec c=vec 0 ,then (1) vec a timesvec b=vec b timesvec c=vec c timesvec a (2) vec a timesvec b=vec c (3) vec a.vec b=vec b.vec c=bar(c).bar a

Let vec a,vec b,vec c are three non-zero vectors and vec b is neither perpendicular to vec a nor to vec c and " (vec a timesvec b)timesvec c=vec a times(vec b timesvec c) .Then the angle between vec a and vec c is:

(vec i timesvec j).vec k=

Prove that (vec B timesvec c)*[vec A times(vec B timesvec C)]=0

show that (vec B timesvec C)*|vec A times(vec B timesvec C)|=0