document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1169138>Question 1169138</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I don't really know the topic. \r<BR>\n" );
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document.write( "Which expression is equivalent to sin(2x) − sinx?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #793779 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</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=793779\">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=sin%282x%29+%E2%88%92+sin%28x%29 ALIGN=MIDDLE  ALT=\"sin%282x%29+%E2%88%92+sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%282x%29=sin%28x%2Bx%29 ALIGN=MIDDLE  ALT=\"sin%282x%29=sin%28x%2Bx%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, use Angle-Sum  Identity\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28alpha+%2B+beta%29+=+sin%28alpha%29+cos%28beta%29+%2B+cos%28alpha%29+sin%28beta%29 ALIGN=MIDDLE  ALT=\"sin%28alpha+%2B+beta%29+=+sin%28alpha%29+cos%28beta%29+%2B+cos%28alpha%29+sin%28beta%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > where <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=alpha=x ALIGN=MIDDLE  ALT=\"alpha=x\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=beta=x ALIGN=MIDDLE  ALT=\"beta=x\"   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=sin%28x+%2B+x%29+=+sin%28x%29+cos%28x%29+%2B+cos%28x%29+sin%28x%29=2sin%28x%29cos%28x%29 ALIGN=MIDDLE  ALT=\"sin%28x+%2B+x%29+=+sin%28x%29+cos%28x%29+%2B+cos%28x%29+sin%28x%29=2sin%28x%29cos%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "then you have\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2sin%28x%29cos%28x%29-sin%28x%29 ALIGN=MIDDLE  ALT=\"2sin%28x%29cos%28x%29-sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >......factor out common <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28x%29 ALIGN=MIDDLE  ALT=\"sin%28x%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=sin%28x%29%282cos%28x%29-1%29 ALIGN=MIDDLE  ALT=\"sin%28x%29%282cos%28x%29-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >=>expression is equivalent to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%282x%29-sin%28x%29 ALIGN=MIDDLE  ALT=\"sin%282x%29-sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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