document.write( "Question 276355: Hi. I have a question about Pythagorean identities. I do not understrand how to write the espression as an integer. The problem is:\r
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Algebra.Com's Answer #201429 by Edwin McCravy(20065) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "First let's learn where the Pythagorean identities came from,\r\n" );
document.write( "namely the Pythagorean theorem:\r\n" );
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document.write( "By the Pythagorean theorem:\r\n" );
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document.write( "Divide through by \r\n" );
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document.write( "That's the first Pythagorean identity:\r\n" );
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document.write( "Divide through by \r\n" );
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document.write( "That's the second Pythagorean identity:\r\n" );
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document.write( "Divide through by \r\n" );
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document.write( "That's the third Pythagorean identity:\r\n" );
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document.write( "Be sure to memorize all three of them.  Usually we write them\r\n" );
document.write( "this way, so they're easier to learn:\r\n" );
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document.write( "Those identities are true for ALL angles \r\n" );
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document.write( "So for\r\n" );
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document.write( "Since the third Pythagorean identity\r\n" );
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document.write( "is true for ALL angles , let , then\r\n" );
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document.write( "So we can replace  by \r\n" );
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document.write( "So your problem:\r\n" );
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document.write( "becomes:\r\n" );
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document.write( "then the \"cotangent squared\"s cancel:\r\n" );
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document.write( "and that just leaves 1, which is an integer.\r\n" );
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document.write( "Edwin

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