`vec(a)= -i+j+2k`, `vec(b)=2i-j-k` and `vec(c)=-2i+j+3k` ,then the angle between `2vec(a)-vec(c)` and `vec(a)+vec(b)` is

If vec a = i +j and vec b = j-k then the angle between vec a + vec b and vec a - vec b is

If vec(A) = 2 I + j - k , vec(B) = I + 2 j + 3 k , and vec(C ) = 6 i - 2 j - 6 k ,then the angle between (vec(A) + vec(B)) and vec(C ) will be

If vec(a)=(hat(i)+2hat(j)-3hat(k)) and vec(b)=(3hat(i)-hat(j)+2hat(k)) then the angle between (vec(a)+vec(b)) and (vec(a)-vec(b)) is

If vec a = 3i -2j + 2k, vec b = 6i-4j-2k and vec c = 3i-2j -4k , then vec a . (vec b xx vec c) is

vec a = i + j + k, vec b = i-j + k, vec c = 2i + 3j-k then (vec aXvec b) Xvec c =

If vec a = i-j+k and vec b = 2i+j-k then |2 vec a - vec b|=