document.write( "Question 1152225: 
Using the properties of determinants and trigonometry identities, show that\r\n" );
document.write( "      |cos(x + x²)   sin(x + x²)  -cos(x + x²)|\r\n" );
document.write( "|A| = |sin(x - x²)   cos(x - x²)   sin(x - x²)|  = sin(2x + 2x²)\r\n" );
document.write( "      |  sin2x           0           sin2x²   |

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Algebra.Com's Answer #774306 by Edwin McCravy(20081)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Let a = x + x²\r\n" );
document.write( "Let b = x - x²\r\n" );
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document.write( "Expand about the bottom row:\r\n" );
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document.write( "Swap the terms in the first big parentheses so you'll recognize the identity:\r\n" );
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document.write( "Using identities for cos(a ± b)\r\n" );
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document.write( "Swapping the factors in the second term so you'll recognize the identity:\r\n" );
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document.write( "Since a = x + x² andb = x - x², a+b = 2x and a-b = 2x² \r\n" );
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document.write( "\"sin%282x%5E%22%22%29cos%282x%5E2%29%5E%22%22%2B%0D%0Acos%282x%29sin%282x%5E2%29%5E%22%22\"\r\n" );
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document.write( "Using identity for sin(a + b),\r\n" );
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document.write( "\"sin%282x%2B2x%5E2%29\"\r\n" );
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document.write( "Edwin
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