document.write( "Question 928162: Find all solutions of the equation 2 cos x -1 = 0.
\n" ); document.write( "The answer is A+Bkpi and C+Dkpi where k is any integer, 0\n" ); document.write( "Please help. \n" ); document.write( "

Algebra.Com's Answer #563894 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2cos%28x%29-1=0\"$
\n" ); document.write( " $\"2cos%28x%29=1\"$
\n" ); document.write( " $\"cos%28x%29=1%2F2\"$
\n" ); document.write( " $\"x=pi%2F3\"$ and $\"x=%285%2F3%29pi\"$
\n" ); document.write( "Both are $\"2pi\"$ -periodic.
\n" ); document.write( " $\"x=pi%2F3%2B%282pi%29k\"$
\n" ); document.write( " $\"x=%285%2F3%29pi%2B%282pi%29k\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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