document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=721039>Question 721039</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can do you prove that secx - (tanx)(sinx) = cosx? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442140 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=442140\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How can do you prove that<BR>\n" );
document.write( "secx - (tanx)(sinx) = cosx?<BR>\n" );
document.write( "Start with left side:<BR>\n" );
document.write( "secx-(tanx)(sinx)<BR>\n" );
document.write( "=(1/cosx)-(sinx/cosx)sinx<BR>\n" );
document.write( "=(1/cosx)-sin^2x/cosx<BR>\n" );
document.write( "=(1-sin^2x)/cos)<BR>\n" );
document.write( "=cos^2x/cosx<BR>\n" );
document.write( "=cosx<BR>\n" );
document.write( "verified: left side=right side </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );