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Other parts of this question

  1. 3(a)Prove that (1 - \sin\theta)/(1 + \sin\theta) = (\sec\theta - \tan\theta)^2.[9 marks]
  2. 3(c)Show that \cos(\pi/2 + x) = -\sin x.[4 marks]
  3. 3(d)A and B are acute angles such that \sin A = 3/5 and \cos B = 5/13. Calculate, without using tables or calculators, the EXACT value of \cos(A - B).[3 marks]

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