document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=641339>Question 641339</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Show that sin 2x/sin x=2cos x (Hint sin 2x = sin (x+x))\r<BR>\n" );
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document.write( "Use the sum formula to for sine to rewrite the left side of the equation. <BR>\n" );
document.write( "sin 2x/sin x= ?/sin x\r<BR>\n" );
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document.write( "Simplify the resulting expression. What is the result?\r<BR>\n" );
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document.write( "Therefore, sin 2x/sin x=2cos x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #403603 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=403603\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Show that sin 2x/sin x=2cos x<BR>\n" );
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document.write( "sin(2x) = 2sin(x)cos(x) </SPAN>\n" );
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