document.write( "Question 741275: sin^4 - cos^4 = 2sin^2 - 1 \n" ); document.write( "
Algebra.Com's Answer #451944 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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