document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189940>Question 1189940</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Product to Sum/Sum to Product (TRIGONOMETRY)<BR>\n" );
document.write( "1. Express cos38 + cos106 as a PRODUCT.<BR>\n" );
document.write( "2. Express cos234 cos125 as SUM<BR>\n" );
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document.write( "Thank You! :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #821479 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=821479\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "1. Express <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%2838%29+%2B+cos%28106%29 ALIGN=MIDDLE  ALT=\"cos%2838%29+%2B+cos%28106%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > as a PRODUCT.\r<BR>\n" );
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document.write( "use Sum-to-Product Identity:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28alpha%29+%2B+cos%28beta%29+=+2cos%28%28alpha+%2Bbeta%29%2F2%29+%2Acos%28%28alpha+-+beta%29%2F2%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%2838%29+%2B+cos%28106%29=2cos%28%2838+%2B106%29%2F2%29%2A+cos%28%2838+-+106%29%2F2%29 ALIGN=MIDDLE  ALT=\"cos%2838%29+%2B+cos%28106%29=2cos%28%2838+%2B106%29%2F2%29%2A+cos%28%2838+-+106%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%2838%29+%2B+cos%28106%29=2cos%2872%29%2A+cos%28-34%29 ALIGN=MIDDLE  ALT=\"cos%2838%29+%2B+cos%28106%29=2cos%2872%29%2A+cos%28-34%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "2. Express <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28234+%29cos%28125%29+ ALIGN=MIDDLE  ALT=\"cos%28234+%29cos%28125%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >as SUM\r<BR>\n" );
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document.write( "use Product-to-Sum Identity: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28alpha%29+cos%28beta%29++=%281%2F2%29+%28cos%28alpha+-+beta%29+%2B+cos%28alpha+%2B+beta%29%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28234+%29cos%28125%29+=%281%2F2%29+%28cos%28234+-+125%29+%2B+cos%28234+%2B+125%29%29+ ALIGN=MIDDLE  ALT=\"cos%28234+%29cos%28125%29+=%281%2F2%29+%28cos%28234+-+125%29+%2B+cos%28234+%2B+125%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28234%29cos%28125%29+=%281%2F2%29+%28cos%28109%29+%2B+cos%28359%29%29 ALIGN=MIDDLE  ALT=\"cos%28234%29cos%28125%29+=%281%2F2%29+%28cos%28109%29+%2B+cos%28359%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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