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Trigonometry - Trigonometric Graphs and Parameters

Trigonometry - Trigonometric Graphs and Parameters

  1. Sketch the graph of \(y = -4 \cos 2x + 1\) for \( 0 \leq x \leq 2\pi\).
  2. By adding a straight line to your sketch, find the number of solutions to the equation \(2\pi \cos 2x - x + \pi = 0\) for \( 0 \leq x \leq 2\pi\).

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Answer:(ii) 4 solutions.

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