document.write( "Question 413602: please help me solve this identity 1-2cos^2 x=2sin^2 x-1 \n" ); document.write( "

Algebra.Com's Answer #290210 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!


\n" );
document.write( "Hi
\n" );
document.write( "solving the identity 
\n" );
document.write( "1-2cos^2 x=2sin^2 x-1
\n" );
document.write( "1 = 2cos^2x+2sin^2x-1
\n" );
document.write( "1 = 2(cos^2x+sin^2x)-1
\n" );
document.write( "1 = 2(1)-1
\n" );
document.write( "1 = 1 \n" );
document.write( "

\n" );