# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2010 | May-Jun | (P2-9709/23) | Q#8

Question i. Prove the identity ii. Hence solve the equation For . Solution i. We are given that; We utilize following two addition formulae; ii. We are required to solve; As demonstrated in (i); Therefore; Since provided that ; Since ; Therefore, we solve for . […]