document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=596137>Question 596137</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Simplify the expression by using a double angle formula.\r<BR>\n" );
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document.write( "2sin((2pi)/(11))cos((2pi)/(11))\r<BR>\n" );
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document.write( "I think it may be sin((4pi)/(11)).<BR>\n" );
document.write( "I am not sure on this and I could use the help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #377549 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=377549\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using the identity \r<BR>\n" );
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document.write( "2*sin(x)*cos(x) = sin(2x)\r<BR>\n" );
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document.write( "we get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" src=\"http://latex.codecogs.com/png.latex?\LARGE 2\sin\left(\frac{2\pi}{11}\right)\cos\left(\frac{2\pi}{11}\right) = \sin\left(2\times\frac{2\pi}{11}\right) = \sin\left(\frac{4\pi}{11}\right)\" title=\"x\" />\r<BR>\n" );
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document.write( "So <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" src=\"http://latex.codecogs.com/png.latex?\LARGE 2\sin\left(\frac{2\pi}{11}\right)\cos\left(\frac{2\pi}{11}\right)=\sin\left(\frac{4\pi}{11}\right)\" title=\"x\" />\r<BR>\n" );
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document.write( "which means you are 100% correct. Nice job. </SPAN>\n" );
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