four times in the interval \(-360^\circ \leq \theta \leq 360^\circ\) so there are four solutions. There is a line of symmetry at \(x = 90^\circ\), so there is a solution at \(180 - 30 = 150^\circ\).
four times in the interval \(-360^\circ \leq \theta \leq 360^\circ\) so there are four solutions. There is a line of symmetry at \(x = 90^\circ\), so there is a solution at \(180 - 30 = 150^\circ\).
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