document.write( "Question 82694: simplify the expression: cscx(tan(-x))\r
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document.write( "simplify the expression: cotxcos(3.14/2-x)\r
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document.write( "verify the identity: cos^4x-sin^4x=cos^2x-sin^2x
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Algebra.Com's Answer #59358 by kev82(151)![]() ![]() ![]() You can put this solution on YOUR website! Hi, \r \n" ); document.write( "\n" ); document.write( "i'm very sorry if I'm wrong, but I get the impression you just want the answers, so I'm going to give some helpful advice instead. If you have tried it then please post where you're stuck. \r \n" ); document.write( "\n" ); document.write( "First question: \r \n" ); document.write( "\n" ); document.write( "Second Question: \r \n" ); document.write( "\n" ); document.write( "Third Question: I'm sure there are many ways to do this. My method is to write everything in terms of cos(2x). What do you get if you let A=B in the addition formula given above for cosine. can you combine this with the identity \r \n" ); document.write( "\n" ); document.write( "Hope that helps, \n" ); document.write( "Kev \n" ); document.write( " |