document.write( "Question 955440: Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π]. Thank you! \n" ); document.write( "

Algebra.Com's Answer #583712 by lwsshak3(11628) $\"\"$ $\"About$

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Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π].
\n" ); document.write( "3+cos(2x)=7/2
\n" ); document.write( "6+2cos(2x)=7
\n" ); document.write( "2cos(2x)=1
\n" ); document.write( "cos(2x)=1/2
\n" ); document.write( "2x=π/6, 11π/6 (In quadrants I and IV where cos>0)
\n" ); document.write( "x=π/12, 11π/12 \n" ); document.write( "

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