document.write( "Question 785176: prove sinA tanA = (cotA cscA)/(cotA cscA) \n" ); document.write( "
Algebra.Com's Answer #477391 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "This is NOT an identity because the right side has \r\n" );
document.write( "the same numerator and denominator and therefore\r\n" );
document.write( "the right side equals to 1.\r\n" );
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document.write( "Therefore \r\n" );
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document.write( "sinA tanA = 1\r\n" );
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document.write( "This has solutions approximately 51.8° and 308.2°.\r\n" );
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document.write( "So it is not an identity.\r\n" );
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document.write( "The problem is botched.  You may post the correct\r\n" );
document.write( "identity in the thank-you note and I'll help you.\r\n" );
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document.write( "Edwin

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