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Other parts of this question

  1. 4(a)Solve cos 2θ - 3 cos θ = 1 for 0 ≤ θ < 2π.[6 marks]
  2. 4(b)If cos A = 3/5, find tan (A/2).[6 marks]
  3. 4(d)Given that sin A = 12/13 and sin B = 4/5, where A and B are acute angles, find cos (A - B) and sin (A + B).[8 marks]

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