document.write( "Question 985310: Prove these identity
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Algebra.Com's Answer #606398 by Edwin McCravy(20063)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"%281%5E%22%22-sin%28A%29%5E%22%22%2Bcos%28A%29%29%5E2\"  \"%22%3F=%3F%22\"  \"2%281-sin%28A%29%5E%22%22%29%5E%22%22%281%2Bcos%28A%29%5E%22%22%29\"\r\n" );
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document.write( "Square out the left side:\r\n" );
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document.write( "\"1%2Bsin%5E2%28A%29%2Bcos%5E2%28A%29-2sin%28A%29%2B2cos%28A%29-2sin%28A%29cos%28A%29\"\r\n" );
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document.write( "Replace sinē(A) by 1-cosē(A):\r\n" );
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document.write( "Remove parentheses:\r\n" );
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document.write( "\"1%2B1-cos%5E2%28A%29%2Bcos%5E2%28A%29-2sin%28A%29%2B2cos%28A%29-2sin%28A%29cos%28A%29\"\r\n" );
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document.write( "Combine like terms:\r\n" );
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document.write( "\"2-2sin%28A%29%2B2cos%28A%29-2sin%28A%29cos%28A%29\"\r\n" );
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document.write( "Factor out 2:\r\n" );
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document.write( "\"2%281-sin%28A%29%5E%22%22%2Bcos%28A%29-sin%28A%29cos%28A%29%29\"\r\n" );
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document.write( "Factor by grouping:  I.e., In the parentheses factor 1 out \r\n" );
document.write( "of the first two terms and factor cos(A) out of the last \r\n" );
document.write( "two terms:\r\n" );
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document.write( "\"2%281%281-sin%28A%29%5E%22%22%29%5E%22%22%2Bcos%28A%29%281-sin%28A%29%5E%22%22%29%29\"\r\n" );
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document.write( "Factor 1-sin(A) out of both terms:\r\n" );
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document.write( "\"2%281-sin%28A%29%5E%22%22%29%281%2Bcos%28A%29%5E%22%22%29\"\r\n" );
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document.write( "Edwin
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