Mathematics 9709 · AS & A Level · Coordinate geometry

Coordinate geometry — practice question

Relative to an origin $O$, the position vectors of points $A$ and $B$ are $?
(a(i))[3]

Find the unit vector pointing in the direction of $\overrightarrow{CD}$.

(a(ii))[6]

With $E$ as the mid-point of $CD$, find angle $EOD$.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correct expression for vector $\overrightarrow{CD}=-3(2,1,2)+2(4,0,6)$

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