document.write( "Question 889599: Sin(x).tan(x)/cos(x) + 1 = 1/cos^2(x)\r
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document.write( "Prove the identity \n" );
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Algebra.Com's Answer #538279 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Sin(x).tan(x)/cos(x) + 1 = 1/cos^2(x)\r \n" ); document.write( "\n" ); document.write( "Prove the identity \n" ); document.write( "---------- \n" ); document.write( "Sin(x)*tan(x)/cos(x) + 1 = 1/cos^2(x) \n" ); document.write( "Sin^2(x)/cos^2(x) + 1 = 1/cos^2(x) \n" ); document.write( "tan^2 + 1 = sec^2 \n" ); document.write( "QED \n" ); document.write( " |