document.write( "Question 1200472: (sinx+cosx)^2+(sinx-cosx)^2=2 \n" ); document.write( "
Algebra.Com's Answer #834611 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
(sinx+cosx)^2+(sinx-cosx)^2=2
\n" ); document.write( "-----------
\n" ); document.write( "sin^2 + 2sin*cos + cos^2 + sin^2 - 2sin*cos + cos^2 = 2
\n" ); document.write( "2sin^2 + 2cos^2 = 2
\n" ); document.write( "sin^2 + cos^2 = 1 --- An identity
\n" ); document.write( "
\n" );