document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=873344>Question 873344</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sec(x)=radical 5 with sinx>0, find tan(2x) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #526845 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=526845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sec(x)=radical 5 with sinx>0, find tan(2x)<BR>\n" );
document.write( "Given reference angle x is in quadrant I<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=secx=sqrt%285%29 ALIGN=MIDDLE  ALT=\"secx=sqrt%285%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cosx=1%2Fsecx=1%2Fsqrt%285%29=sqrt%285%29%2F5 ALIGN=MIDDLE  ALT=\"cosx=1%2Fsecx=1%2Fsqrt%285%29=sqrt%285%29%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sinx=sqrt%281-cos%5E2%28x%29%29=sqrt%281-%285%2F25%29%29=sqrt%2820%2F25%29=sqrt%2820%29%2F5%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tanx=sinx%2Fcosx=sqrt%2820%29%2Fsqrt%285%29=sqrt%284%29=2 ALIGN=MIDDLE  ALT=\"tanx=sinx%2Fcosx=sqrt%2820%29%2Fsqrt%285%29=sqrt%284%29=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Identity: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%282x%29=%282tanx%29%2F%281-tan%5E2%28x%29%29=4%2F%281-4%29=4%2F-3=-4%2F3 ALIGN=MIDDLE  ALT=\"tan%282x%29=%282tanx%29%2F%281-tan%5E2%28x%29%29=4%2F%281-4%29=4%2F-3=-4%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Calculator check:<BR>\n" );
document.write( "cosx=&#8730;5/5<BR>\n" );
document.write( "x&#8776;63.43&#730;<BR>\n" );
document.write( "2x&#8776;126.86&#730;<BR>\n" );
document.write( "tan 2x&#8776;tan(126.86)&#8776;-1.333…<BR>\n" );
document.write( "exact value as calculated above=-4/3&#8776;-1.333…<BR>\n" );
document.write( " </SPAN>\n" );
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