Trigonometry - Symmetry of Trigonometric Functions

Trigonometry - Symmetry of Trigonometric Functions

TGM Original Questions

Given that \(\operatorname{cosec} \alpha = x\) and \(0^\circ < \alpha < 90^\circ\), express each of the following in terms of \(x\).

  1. \(\sin \alpha\)
  1. \(\tan (2\pi - \alpha)\)
  1. \(\sec (\alpha - 90^\circ)\)
  1. \(\cos (-\alpha)\)
  1. \(\cot (90^\circ - \alpha)\)
  1. \(\operatorname{cosec} (\pi - \alpha)\)

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Answer:(i) \(\frac{1}{x}\) (ii) \(\frac{\sqrt{x^2-1}}{x}\) (iii) \(-\frac{\sqrt{x^2-1}}{x^2-1}\) (iv) \(\frac{\sqrt{x^2-1}}{x^2-1}\) (v) \(x\) (vi) \(x\)

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