1.

If vec(a), vec(b) are not perpendicular to each other and vec(r ) xx vec(b) = vec(c ) xx vec(b), vec(r ). vec(a)= 0, then vec(r )=

Answer»

`VEC(C )- (vec(c ).vec(a))/(vec(a).vec(B))`
`vec(c )+ (vec(a).vec(b))/(vec(c ).vec(a))`
`vec(c )- (vec(c ).vec(a))/(vec(a).vec(b)) vec(b)`
`vec(c )-(vec(a).vec(b))/(vec(c ).vec(a)) vec(b)`

ANSWER :C


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