document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=232731>Question 232731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1-(cosB-sinB)^2=sin2B </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #172035 by </B><A HREF=/tutors/aboutme.mpl?userid=chibisan><B>chibisan(131)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=chibisan><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=chibisan><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=172035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1-(cosB-sinB)^2=sin2B\r<BR>\n" );
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document.write( "L.H.S<BR>\n" );
document.write( "1-(cos^2B-2sinBcosB + sin^2B)<BR>\n" );
document.write( "1-cos^2B + 2sinBcosB -sin ^2B\r<BR>\n" );
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document.write( "by using sinB+cosB=1 <BR>\n" );
document.write( "and 2sinBcosB=sin2B (double angle)\r<BR>\n" );
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document.write( "sinB + sin2B - sin^2B<BR>\n" );
document.write( "= sin2B (proven) </SPAN>\n" );
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