document.write( "Question 1141649: Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π] \n" ); document.write( "

Algebra.Com's Answer #762235 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+3+%2B+cos%28+2x+%29+=+3.5+\"$
\n" ); document.write( " $\"+cos%28+2x+%29+=+1%2F2+\"$
\n" ); document.write( "The angles whose cosine = $\"+1%2F2+\"$ are
\n" ); document.write( "in the 1st and 4th quadrants.
\n" ); document.write( " $\"+arc+cos+%28+1%2F2+%29+=+pi%2F3+\"$
\n" ); document.write( " $\"+arc+cos+%28+1%2F2+%29+=+5%2A%28+pi%2F3+%29+\"$
\n" ); document.write( "----------------------------------
\n" ); document.write( " $\"+2x+=+pi%2F3+\"$
\n" ); document.write( " $\"+x+=+pi%2F6+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+2x+=+5%2A%28+pi%2F3+%29+\"$
\n" ); document.write( " $\"+x+=+5%2A%28+pi%2F6+%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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