document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204708>Question 204708</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please help me solve this trigonometric identities question: 1)Prove the following identities.<BR>\n" );
document.write( "a) 1-cos^2 x=tan^2 xcos^2 x<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 #154492 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=154492\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1-cos^2 x=tan^2xcos^2 x<BR>\n" );
document.write( "1-cos^2 x=(tan^2x)cos^2 x<BR>\n" );
document.write( "1-cos^2 x=(sin^2x/cos^2x)cos^2 x<BR>\n" );
document.write( "1-cos^2 x=sin^2x<BR>\n" );
document.write( "1 = sin^2 + cos^2\r<BR>\n" );
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document.write( "You know the last one is true. So just work backwards from there </SPAN>\n" );
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