2022 AHS AMath Prelims P2 Ans

2022 ADDITIONAL MATHEMATICS PRELIM PAPER 2 Answer Key 1 2 6 k   8 (a) - (b)  136 cos 2 31.0 6P     (c) Max value of 17.7 (3 sf)P 15.5 (1 dp)   2 6 or 6x x  2.45 or 2.45x x  9 (i)  Centreof circle 5,3  Radius of circle 5units (ii) - (iii) 36k  3 2x or 2 3x  or 4x 10 (a)  d 2 8 cot 4 tan 4d y x xx    (b) 18 πy x  4 1.29 (3 sf)x 11  2 d 1 d cos sin y x x x     3π 2 4 20 2cos cos 2 1 d 2cos sin x x x x x    5 (a) Since 0 10r  and 7.5r , Therefore 8, 9, 10r there are only three terms of non-negative powers of x. (b)  13715 or NA 10n  12 (i) 5 3t  or 5t  (ii) 3 2 10 25 6s t t t    (iii) 8 cm (iv) - 6 1a , 2b 13 (a) - (b) 2 1.22y x  7 (a) - (b) - (c) -