The points C C\,C and D D\,D have position vectors (4−12)\begin{pmatrix} 4 \\ -1 \\ 2 \end{pmatrix}4−12 and (035)\begin{pmatrix} 0 \\ \mathrm{3} \\ 5 \end{pmatrix}035 respectively.
Find the exact length of CDCDCD.
42 exam-style questions on OCR A Level Maths 1.10.2 Vectors in three dimensions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.