If `| vec a+ vec b|<| vec a- vec b|,` then the angle between ` vec aa n d vec b` can lie in the interval a. `(pi//2,pi//2)` b. `(0,pi)` c. `(pi//2,3pi//2)` d. `(0,2pi)`

If angle between vec a and vec b is pi/3 then angle between vec a and -2vec b is:

if |vec a|=4,|vec b|=2 and the angle between vec a and vec b is (pi)/(6) then (vec a xxvec b)^(2) is equal to

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 and vec b be two unit vectors and theta is the angle between them.Then vec a+vec b is an unit vector,if theta=(pi)/(2) b.(2 pi)/(3) c.(pi)/(4) d.(pi)/(3)

vec a + vec b + vec c = vec 0, | vec a | = 3, | vec b | = 5, | vec c | = 7 then angle between vec a and vec b is

vec a+vec b+vec c=vec 0,|vec a|=3,|vec b|=5,|vec c|=7 then the angle between vec a and vec b is (pi)/(6) b.(2 pi)/(3) c.(5 pi)/(3)d*(pi)/(3)

If vec a+2"" vec b+3"" vec c="" vec0 and |"" vec a|=6,|"" vec b|=3a n d|"" vec c|=2 , then angle between vec aa n d"" vec b is

If |vecc|=2 , |veca|=|vecb|=1 and vecaxx(vecaxxvecc)+vecb=vec0 then the acute angle between veca and vecc is (A) pi/6 (B) pi/4 (C) pi/3 (D) (2pi)/3

If vec a and vec b are two vectors,such that vec a*vec b<0 and |vec a*vec b|=|vec a xxvec b|, then the angle between vectors vec a and vec b is pi b.7 pi/4 c.pi/4d.3 pi/4

If vec a,vec b, and vec c are such that [vec avec bvec c]=1,vec c=lambdavec a xxvec b, angle, between vec a and vec b is (2 pi)/(3),|vec a|=sqrt(2),|vec b|=sqrt(3) and |vec c|=(1)/(sqrt(3)) then the angel between vec a and vec b is (pi)/(6) b.(pi)/(4) c.(pi)/(3) d.(pi)/(2)