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 #713770 by AnlytcPhil(1807) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "I tried it using the identity that you chose, but it became\r\n" );
document.write( "more and more complicated, so I tried the \"product to sum\"\r\n" );
document.write( "formula above, and, as you see, it was fairly straight forward.  \r\n" );
document.write( "I could also have used the \"sum to product\" formula working \r\n" );
document.write( "with the right side.  The formulas you need for such problems are:\r\n" );
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document.write( "Sum or difference to product:\r\n" );
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document.write( "Product to sum or difference\r\n" );
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document.write( "All those are easily proved using formulas for sin(A±B) and cos(A±B)\r\n" );
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document.write( "Edwin

(AKA AnlytcPhil)
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