2025 BVSS PRELIMS P2 Q8

2025 BVSS PRELIMS P2 Q8

Secondary 4
9 marks
2025 Bedok View Secondary School Prelims A Math Paper 2

Do not use a calculator in this question.

  1. Find the exact value of \(\mathrm{cosec}\ A\) when \(\cos 2A=\frac{1}{3}\) and \(A\) is acute.[4]
  2. Hence, find the exact value of \(\mathrm{cosec}\ A-\sqrt{2}\sin 105^\circ\).[5]

Solution:

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Answer:(a) \(\sqrt{3}\) (b) \(\dfrac{\sqrt{3}-1}{2}\)

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