document.write( "Question 1148987: find value of A when sinA = Sin 2A and A is between 0 and 360 degree
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Algebra.Com's Answer #770326 by greenestamps(13203)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "\"sin%28A%29+=+sin%282A%29\"

\n" ); document.write( "There is only one thing you can do to that to get started: use the identity for sin(2A).

\n" ); document.write( "\"sin%28A%29+=+2sin%28A%29cos%28A%29\"

\n" ); document.write( "Then it's basic algebraic techniques from there: get 0 on one side and factor.

\n" ); document.write( "\"sin%28A%29-2sin%28A%29cos%28A%29+=+0\"
\n" ); document.write( "\"sin%28A%29%281-2cos%28A%29%29+=+0\"

\n" ); document.write( "\"sin%28A%29+=+0\" or \"1-2cos%28A%29+=+0\"

\n" ); document.write( "I'll let you finish from there.

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