document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=952695>Question 952695</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove. \r<BR>\n" );
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document.write( "Tan^2(x)+cos2(x)=1-cos2(x)tan^2(x) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #581959 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=581959\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Prove. <BR>\n" );
document.write( "Tan^2(x)+cos2(x)=1-cos2(x)tan^2(x)<BR>\n" );
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document.write( "[sin^2/cos^2) + cos^2 - sin^2 = 1-(cos^2-sin^2)(sin^2/cos^2)<BR>\n" );
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document.write( "Multiply thru by cos^2 to get::<BR>\n" );
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document.write( "sin^2 + cos^4 - cos^2*sin^2 = cos^2 - cos^2*sin^2 + sin^4<BR>\n" );
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document.write( "sin^2 + cos^4 = cos^2 + sin^4<BR>\n" );
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document.write( "cos^4-sin^4 = cos^2-sin^2<BR>\n" );
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document.write( "Divide both sides by cos^2-sin^2 to get::<BR>\n" );
document.write( "cos^2 + sin^2 = 1<BR>\n" );
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document.write( "1 = 1<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------ </SPAN>\n" );
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