document.write( "Question 513762: find x if sin2x=-1/2 \n" ); document.write( "

Algebra.Com's Answer #343138 by Gogonati(855) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"sin%282x%29=-1%2F2\"$ As you know $\"sin%287pi%2F6%29=-1%2F2\"$ and $\"+sin%28-pi%2F6%29=-1%2F2\"$ \r
\n" ); document.write( "\n" ); document.write( "Therefore the solution is: $\"2x=7pi%2F6%2B-2n%2Api\"$ => $\"x=7pi%2F12%2B-n%2Api\"$ , and\r
\n" ); document.write( "\n" ); document.write( " $\"2x=-pi%2F6%2B-2n%2Api\"$ => $\"x=-pi%2F12%2B-n%2Api\"$ , where n=+-1, +-2, ... \n" ); document.write( "

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