document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=400530>Question 400530</A>: <I><SPAN STYLE=\"word-break: break-all;\"> verify of the following is an identyity<BR>\n" );
document.write( "sin^4x-cos^4x=2sin^2x-1\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #283520 by </B><A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><B>Tatiana_Stebko(1539)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Tatiana_Stebko><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=283520\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sinx%29%5E4-%28cosx%29%5E4=2%28sinx%29%5E2-1 ALIGN=MIDDLE  ALT=\"%28sinx%29%5E4-%28cosx%29%5E4=2%28sinx%29%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Lets work with left side <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sinx%29%5E4-%28cosx%29%5E4 ALIGN=MIDDLE  ALT=\"%28sinx%29%5E4-%28cosx%29%5E4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use FORMULA<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2-b%5E2=%28a-b%29%2A%28a%2Bb%29 ALIGN=MIDDLE  ALT=\"a%5E2-b%5E2=%28a-b%29%2A%28a%2Bb%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sinx%29%5E4-%28cosx%29%5E4=%28%28sinx%29%5E2%29%5E2-%28%28cosx%29%5E2%29%5E2=%28%28sinx%29%5E2-%28cosx%29%5E2%29%2A%28%28sinx%29%5E2%2B%28cosx%29%5E2%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use FORMULAS <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sinx%29%5E2%2B%28cosx%29%5E2=1 ALIGN=MIDDLE  ALT=\"%28sinx%29%5E2%2B%28cosx%29%5E2=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "_____________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cosx%29%5E2=1-%28sinx%29%5E2 ALIGN=MIDDLE  ALT=\"%28cosx%29%5E2=1-%28sinx%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28sinx%29%5E2-%28cosx%29%5E2%29%2A%28%28sinx%29%5E2%2B%28cosx%29%5E2%29=%28%28sinx%29%5E2-%281-%28sinx%29%5E2%29%29%2A1=%28sinx%29%5E2-1%2B%28sinx%29%5E2=2%28sinx%29%5E2-1 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "SO<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%28sinx%29%5E2-1=2%28sinx%29%5E2-1 ALIGN=MIDDLE  ALT=\"2%28sinx%29%5E2-1=2%28sinx%29%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > is an identity<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );