2025 PHS P2 Q8

2025 PHS P2 Q8

Secondary 4
9 marks
  1. Prove that \(\dfrac{\cot A\cos A}{\cot A+\cos A}=\dfrac{1-\sin A}{\cos A}\).[4]
  2. Solve the equation \(2\sin x\cos x+4\cos^2x=2\) for \(0^\circ\le x\le180^\circ\).[5]

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Answer:(a) Identity proved on its domain. (b) \(x=58.3^\circ,148.3^\circ\).

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