Paper Reference(s)

Common incorrect answers were 3(x + sin 2x)2 ( 2 cos 2x, 3(x + sin 2x)2 ( 1 + 2 cos 2x or 3(x + sin 2x)2 ( (1 + cos 2x) ( 2. Candidates’ responses in Q4(ii) showed many concise and clear solutions. A majority expressed in terms of y, although many did not know, or use the formula sheet, to state that the differential of cot y is –cosec 2y. ................
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