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OpenStudy (anonymous):
Find all solutions in radians using exact values only. (Enter your answers as a comma-separated list. Let k be any integer.) cos^4 3x = 1
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OpenStudy (anonymous):
where are you stuck?
OpenStudy (jdoe0001):
\(\bf cos^4(3x) = 1\implies \sqrt[4]{cos^4(3x) }=\sqrt[4]{1}\implies cos(3x)=1\\ \quad \\ cos^{-1}[cos(3x)]=cos^{-1}(1)\)
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