document.write( "Question 302465: please demonstrate how sin^2 + tan^2 + cos^2 = sec^2 \n" ); document.write( "
Algebra.Com's Answer #216855 by Alan3354(69443)\"\" \"About 
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sin^2 + tan^2 + cos^2 = sec^2
\n" ); document.write( "Sin^2 + cos^2 = 1 Pythagorean identity
\n" ); document.write( "--> tan^2 + 1 = sec^2
\n" ); document.write( "Multiply thru by cos^2
\n" ); document.write( "--> sin^2 + cos^2 = 1\r
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