document.write( "Question 921419: prove that :
\n" ); document.write( "2 (cos^2)A+ cos A - 1 = 0
\n" ); document.write( "

Algebra.Com's Answer #558987 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
It doesn't
\n" ); document.write( "
\n" ); document.write( "
\n" );