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    im stuck, i cannot work out how to find position vectors on a line, forexample, i can find the equation of a line, i can prove lines are perp, find angles, prove lines lintersect but i just cannot work out how too find a point on a line

    a question im stuck on is q 6 on the examination paper in the back of the c4 book, part b, where it says "find position vector of point P such that OP is perp to AB"

    please help rep given if your into that sorta thing
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    I presume you know AB. Then just consider a general point in terms of lambdas or whatever. Dot with AB and put equal to 0. Solve for lambda.
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    thanks man wll give it a crack

    i want your babies
 
 
 
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Updated: June 13, 2006

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