# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2002 | Oct-Nov | (P1-9709/01) | Q#7

Hits: 399 Question Given that , and , find i. the angle between the directions of and , ii. the value of for which and are perpendicular. Solution We have the position vectors; i. To find the direction (i.e. angle) between and we first find the scalar/dot product of and . The scalar or dot product of […]