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MARKING GUIDELINE -3- T970(E)(N24)T MATHEMATICS N6 Copyright reserved Please turn over 2.2 y = sin 2x .cos 2xdx 3 7   sin 2x.sin 2x. cos 2xdx 2 7      1 cos 2x sin 2x.cos 2xdx 2 7    du xdx x dx du u x 2sin 2 2sin 2 cos 2            u u du 2 7 1 2 1       u u du 7 9 2 1                 8 10 2 8 10 1 u u    c x x            10 cos 2 8 cos 2 2 1 8 10 c x x     20 cos 2 16 cos 28 10 Or y = sin 2x .cos 2xdx 3 7   sin 2x.sin 2x. cos 2xdx 2 7      1 cos 2x sin 2x.cos 2xdx 2 7      (sin 2x cos 2x sin 2x cos 2x)dx 7 9    (sin 2x cos 2x)dx (sin 2x cos 2x)dx 7 9     x du dx x dx du u x 2sin 2 2sin 2 cos 2            c x x    )  10 cos 2 ( 2 1 ) 8 cos 2 ( 2 1 8 10 (8)

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