document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=444008>Question 444008</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help solving this problem. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++sin%28x%29%2Atan%28x%29=%281-cos%5E2%28x%29%29%2Fcos%28x%29++ ALIGN=MIDDLE  ALT=\"++sin%28x%29%2Atan%28x%29=%281-cos%5E2%28x%29%29%2Fcos%28x%29++\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "please help me i have been working on this four hours.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #306441 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=306441\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  sin(x)*tan(x)=(1-cos^2(x))/cos(x)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "For (0 <= x <= 90º)<BR>\n" );
document.write( "sinxtanx=(1-cosx)/cosx<BR>\n" );
document.write( "sinx(sinx/cosx)=(1-cosx)/cosx<BR>\n" );
document.write( "cancel out cosx<BR>\n" );
document.write( "sin^2x=1-cosx<BR>\n" );
document.write( "1-cos^2x=1-cosx<BR>\n" );
document.write( "cos^2x-cosx=0<BR>\n" );
document.write( "cosx(cosx-1)=0<BR>\n" );
document.write( "cosx=0<BR>\n" );
document.write( "x=90º<BR>\n" );
document.write( "cosx-1=0<BR>\n" );
document.write( "cosx=1<BR>\n" );
document.write( "x=0 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );