document.write( "Question 880940: Which identity is not used in the proof of the identity 1 + cot^2(theta) = csc^2(theta)? \n" ); document.write( "

Algebra.Com's Answer #531858 by Edwin McCravy(20065) $\"\"$ $\"About$

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document.write( "Here's the proof.\r\n" );
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document.write( "By the Pythagorean theorem, in any right triangle,\r\n" );
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document.write( "Divide every term by \r\n" );
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document.write( "Use a rule of exponents\r\n" );
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document.write( "Therefore\r\n" );
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document.write( "We only used the Pythagorean theorem and the definition of the trig\r\n" );
document.write( "ratios cotangent and cosecant.  There are many identities we did not need to use.\r\n" );
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document.write( "Edwin

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