document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=929033>Question 929033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please explain\r<BR>\n" );
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document.write( "Evaluate the expression without using a calculator:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28sin+%28pi%2F4%29+cos+%28pi%2F6%29+-+sin+%28pi%2F6%29+cos+%28pi%2F4%29%29%5E2+ ALIGN=MIDDLE  ALT=\"+%28sin+%28pi%2F4%29+cos+%28pi%2F6%29+-+sin+%28pi%2F6%29+cos+%28pi%2F4%29%29%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " \r<BR>\n" );
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document.write( "THANKS </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #564079 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=564079\">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=+%28sin+%28pi%2F4%29+cos+%28pi%2F6%29+-+sin+%28pi%2F6%29+cos+%28pi%2F4%29%29%5E2+ ALIGN=MIDDLE  ALT=\"+%28sin+%28pi%2F4%29+cos+%28pi%2F6%29+-+sin+%28pi%2F6%29+cos+%28pi%2F4%29%29%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "***<BR>\n" );
document.write( "rearrange terms:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sin%28pi%2F4%29cos%28pi%2F6%29-cos%28pi%2F4%29%29sin%28pi%2F6%29%5E2 ALIGN=MIDDLE  ALT=\"%28sin%28pi%2F4%29cos%28pi%2F6%29-cos%28pi%2F4%29%29sin%28pi%2F6%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Identity: sin(x-y)=sinxcosy-cosxsiny)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28pi%2F4%29cos%28pi%2F6%29-cos%28pi%2F4%29sin%28pi%2F6%29=sin%28pi%2F4-pi%2F6%29=sin%283pi%2F12-2pi%2F12%29=sin%28pi%2F12%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(sin (pi/4)cos(pi/6)-sin(pi/6)cos(pi/4))^2=sin^2(&#960;/12)  </SPAN>\n" );
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