document.write( "Question 1099317: please could you verify this? $\"%28tan%285x%2F2%29%29%2F%28tan%28x%2F2%29%29+=+%28sin3x%2Bsin2x%29%2F%28sin3x-sin2x%29\"$ This is where I got stuck. \n" ); document.write( "

Algebra.Com's Answer #713759 by Edwin McCravy(20064) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "To prove:\r\n" );
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document.write( "Work with left side:\r\n" );
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document.write( "Change to sines and cosines:\r\n" );
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document.write( "Invert and multiply\r\n" );
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document.write( "Use a 'product to sum' formula, which is:\r\n" );
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document.write( "         [That's easy to prove using the formulas for sin(A±B)]\r\n" );
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document.write( "Use the \"odd-even\" identity sin(-A) = -sin(A)\r\n" );
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document.write( "Edwin

AKA AnlytcPhil \n" ); document.write( "

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