document.write( "Question 590189: (1+sinx)[1+sin(-x)]=cos^2x \n" ); document.write( "

Algebra.Com's Answer #375081 by lwsshak3(11628) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1+sinx)[1+sin(-x)]=cos^2x
\n" ); document.write( "Starting with left side:
\n" ); document.write( "(1+sinx)[1+sin(-x)]
\n" ); document.write( "sin(-x)=-sin(x)
\n" ); document.write( "(1+sinx)[1-sin(x)]
\n" ); document.write( "difference of squares
\n" ); document.write( "1-sin^2x=cos^2x
\n" ); document.write( "verified:
\n" ); document.write( "left side = right side \n" ); document.write( "

\n" );