Allow one error or [5 ± ÷ 6 √59] M1 (5 ± 109) ÷ 6 √ A1 2.57 and –0.91 SC1 2.3 and –0.45 A1 [3] M123. tan 38 = BC/7.21 or BC sin 38 = 7.21 sin 52 ⁄ ⁄ M1 7.21 × tan 38 or 7.21 × sin 38 ÷ sin 52 M1 dep 5.6 (3 …) A1 5.6 or 5.63 B1 ft [4] M124. (a) y = 2 sin x oe y = 2 f( x ) =’ or =’ missing penalize first time only ‘y ‘x B1 (b) y = 1 + sin x oe y = 1 + f( x ) B1 (c) y = sin x –
Allow one error or [5 ± √59] ÷ 6 M1 (5 ± √ 109) ÷ 6 A1 2.57 and –0.91 SC1 2.3 and –0.45 A1 [3] M123. tan 38 = BC/7.21 or BC ⁄ sin 38 = 7.21 ⁄ sin 52 M1 7.21 × tan 38 or 7.21 × sin 38 ÷ sin 52 M1 dep 5.6 (3 …) A1 5.6 or 5.63 B1 ft [4] M124. (a) y = 2 sin x oe y = 2 f( x ) ‘y =’ or ‘x =’ missing penalize first time only B1 (b) y = 1 + sin x oe y = 1 + f( x ) B1 (c) y = – sin x
AllUnit3QnsandmarkschemeWordversion.docx