# Find the equation of a line which is perpendicular to a given vector and passing through a known point

There is given a vector 2i+j-3k and now I want to find the equation of a line that is perpendicular to the given vector and passing through a known point (1,1,1) .How can I solve this ?.

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Instead of Cross product why can't we use the Dot product.Because the Dot product of any two perpendicular vectors are equal to 0. –  Thusitha May 13 '12 at 11:54