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IP2U12 Exercise Trigonometry II (also for 3EM U7 Worksheet) Q1

IP2U12 Exercise Trigonometry II (also for 3EM U7 Worksheet) Q1

IP 2

If \(0^\circ < x < 180^\circ\), determine the possible values of \(x\) for each of the following, giving your answers correct to \(1\) decimal place.

  1. \(\cos x = -0.629\)
  2. \(\sin x = 0.478\)

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Answer:(i) \(129.0^\circ\) (ii) \(28.6^\circ\) or \(151.4^\circ\)

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