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OpenStudy (stepht):
5 cos 2 θ = 1 for 0o < θ < 360o
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OpenStudy (irishboy123):
\(5 cos 2 θ = 1\) so \( cos 2 θ = \frac{1}{5}\) |dw:1439500108937:dw| solve for \(2 \theta\) using you calculator, then for \( \theta\)
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