document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=408715>Question 408715</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sin(a+b)-sin(a-b)=2cosasinb<BR>\n" );
document.write( "How do I solve this problem? I am so close to a break down over this. Help!!<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 #287850 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=287850\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sin(a+b)-sin(a-b)=2cos(a)sin(b)\r<BR>\n" );
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document.write( "sin(a)cos(b)+cos(a)sin(b)-(sin(a)cos(b)-cos(a)sin(b))=2cos(a)sin(b)\r<BR>\n" );
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document.write( "sin(a)cos(b)+cos(a)sin(b)-sin(a)cos(b)+cos(a)sin(b)=2cos(a)sin(b)\r<BR>\n" );
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document.write( "(sin(a)cos(b)-sin(a)cos(b))+(cos(a)sin(b)+cos(a)sin(b))=2cos(a)sin(b)\r<BR>\n" );
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document.write( "0+2cos(a)sin(b)=2cos(a)sin(b)\r<BR>\n" );
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document.write( "2cos(a)sin(b)=2cos(a)sin(b)\r<BR>\n" );
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document.write( "So the original equation is an identity (ie it's true for ALL values of 'a' and 'b')\r<BR>\n" );
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document.write( "If you need more help, email me at <a  rel=nofollow HREF=\"mailto:jim_thompson5910@hotmail.com\">jim_thompson5910@hotmail.com</a>\r<BR>\n" );
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document.write( "Jim </SPAN>\n" );
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