# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2011 | Oct-Nov | (P1-9709/13) | Q#6

Hits: 400 Question Relative to an origin , the position vectors of points A and B are and , respectively. i. Use a scalar product to calculate angle BOA. The point C is the mid-point of AB. The point D is such that . ii. Find . Solution i. We recognize that angle BOA is between and . […]