Trigonometry - Symmetry of Trigonometric Functions

Trigonometry - Symmetry of Trigonometric Functions

TGM Original Questions

Given that \(\tan \beta = p\) and \(180^\circ < \beta < 270^\circ\), express each of the following in terms of \(p\).

  1. \(\cot \beta\)
  1. \(\sin (-\beta)\)
  1. \(\sec (270^\circ - \beta)\)
  1. \(\sin (90^\circ - \beta)\)
  1. \(\sec (\beta + 180^\circ)\)
  1. \(\operatorname{cosec} (\beta - 90^\circ)\)

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Answer:(i) \(\dfrac{1}{p}\); (ii) \(-\dfrac{\sqrt{p^2 + 1}}{p^2 + 1}\); (iii) \(\dfrac{p \sqrt{p^2 + 1}}{p^2 + 1}\); (iv) \(\sqrt{p^2 + 1}\); (v) \(\dfrac{\sqrt{p^2 + 1}}{p}\); (vi) \(\sqrt{p^2 + 1}\)

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