Tiêu đề Copy of T980- MATHEMATICS N6 MEMO AUG 2015.pdf ✅

MARKING GUIDELINE -3- T980(E)(A6)T MATHEMATICS N6 Copyright reserved Please turn over QUESTION 2 2.1 y = dx x 2 cot4  = dx x x 2 .cot 2 cot2 2    = dx x x ec 2 1).cot 2 (cos 2 2     = dx x dx x x ec    2 ) cot 2 .cot 2 (cos 2 2 2     = x c x x                2 cot 2 1 1 3 2 cot 2. 3 = x c x x     2 2 cot 2 cot 3 2 3 (8 x 1⁄2) (4) 2.2 y = x x dx 2 12  6  3    x c x x x c x x x dx x x x x x x x                                              1 2 1 2 2 2 2 2 2 2 5 ( 1) 2 3( 1) 5 ( 1) sin 2 5 3 5 ( 1) 2 ( 1) 5 ( 1) sin 2 5 3 3 5 ( 1) 3[5 ( 1) ] 3[( 1) 5] 3[( 1) 4 1] 3( 2 4) 3 6 12 Or x x c x        1 2 0,866( 1) 5 ( 1) 2,236 ( 1) 4,33sin (8 x 1⁄2) (4)        