[" If "a=-i+j+2k,b=2hat i-j-k" and "c=-2i+j+3k],[" then the angle between "2a-c" and "a+bis]

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

Consider the parallelopiped wide sides a = 3i + 2j + k, b = I + j + 2k and c = I + 3j + 3k then the angle between a and the plane containing the face determined by b and c is

If a=3i+2j+k, b=5i-j+2k" and "c=i+j+k , find [a b c]

If a = 3i - 2j + k, b = 2i - 4j - 3k, c = -i + 2j + 2k then a + b + c =

If a = i - j + 2k, b = 2i + 3j + k, c = i - k , then magnitude of a + 2b-3c 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 a = i- 2j + k, b = 2i + j - k, c = 4i + 4j + 3k then |(a xx b) xx c| =

If a = i + j - 2k, b = -i + 2j + k, c = i - 2j + 2k, then a unit vector parallel to a + b + c =