Paper 1 October/November 2009 MATHEMATICH (9709/11) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

The diagram shows triangle $OAB$, in which the position vectors of $A$ and $B$ with respect to $O$ are given by
$\overrightarrow {OA} = 2i + j - 3k$ and $\overrightarrow {OB} = - 3i + 2j - 4k$.
$C$ is a point on $OA$ such that $\overrightarrow {OC} = p\,\overrightarrow {OA} $, where $p$ is a constant.
a) Find angle $AOB$.
b) Find $\overrightarrow {BC} $ in terms of p and vectors $i$, $j$ and $k$.
c)…