2023 YTSS P1 Q8

2023 YTSS P1 Q8

Secondary 4
4 marks

Given that \(\operatorname{cosec}A=\dfrac p2\), where \(A\) is obtuse, express each of the following in terms of \(p\).

  1. \(\cot A\),[2]
  2. \(\cos2A\).[2]

Solution:

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Answer:(a) \(-\dfrac{\sqrt{p^2-4}}2\). (b) \(\dfrac{p^2-8}{p^2}\).

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