document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=745381>Question 745381</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove the following identity\r<BR>\n" );
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document.write( "Csc x - 2 sin x= cos (2x)/sin x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #453825 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=453825\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Csc x - 2 sin x= cos (2x)/sin x<BR>\n" );
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document.write( "Multiply thru by sin(x) to get:<BR>\n" );
document.write( "1 - 2sin^2(x) = cos(2xs)<BR>\n" );
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document.write( "That is one of the Pythagorean identities:<BR>\n" );
document.write( "cos(2x) = cos(2x)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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