document.write( "Question 868199: Find the exact value by using a sum or difference identity.\r
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Algebra.Com's Answer #523398 by Edwin McCravy(20059) $\"\"$ $\"About$

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document.write( "Using the sum identity:\r\n" );
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document.write( "sin(75°) = sin(45°+30°) = sin(45°)cos(30°) + cos(45°)sin(30°) =\r\n" );
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document.write( "-----------------------------------\r\n" );
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document.write( "Using the difference identity:\r\n" );
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document.write( "sin(75°) = sin(120°-45°) = sin(120°)cos(45°) - cos(120°)sin(45°) =\r\n" );
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document.write( "Edwin

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