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m —2n+1=O Give your answers correct to four sigfficant sigure. Berikanjawapan anda Etul kepada empat angka bererti. sin 2x (a) Prove that = cot x I —cos 2x sin2x Buktikan bahawa = cotx 1 —cos2x (b) (i) Sketchthegaphofy=2sin2x+1 for OSxS2x. Lakarkangrafy=2sinžx+l untuk OSxS2z. 347212 [5 marks] [2 marks] [2 markah ................
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