document.write( "Question 735208: How to find: cot 90\r
\n" ); document.write( "\n" ); document.write( "Tan 90 is undefined, so I thought cot 90 would be undefined also. However, \"undefined\" is not the answer given in the back of my textbook.
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Algebra.Com's Answer #449315 by MathLover1(20855)\"\" \"About 
You can put this solution on YOUR website!
\"cot%2890%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"tan%28+90%29\" is undefined, and \"cot%2890%29=1%2Ftan%2890%29=1%2Fundefined=0\"
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