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OpenStudy (anonymous):
solve the equation 2+ 4 cos^2 2x^(degree) giving your interval from -180 to 180
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OpenStudy (sirm3d):
\[\large 2 + 4 \cos ^2 2x = ? \]where \[\large -180\text O<x \le 180^\text O\]
OpenStudy (anonymous):
2x where x has a degree on top
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