document.write( "Question 917680: 〖Sin〗^4 θ-〖Cos〗^4 θ=〖Sin〗^2 θ-〖Cos〗^2 θ=2〖Sin〗^2 θ-1=1-2〖Cos〗^2 θ \n" ); document.write( "
Algebra.Com's Answer #556751 by nihar*2013(34)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( ".
\n" ); document.write( "let m know if you need anymore help
\n" ); document.write( "
\n" );