document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=928626>Question 928626</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of cos(t/2) if<BR>\n" );
document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+tan%28t%29=12%2F5+ ALIGN=MIDDLE  ALT=\"+tan%28t%29=12%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+pi%3Ct%3C3pi%2F2+ ALIGN=MIDDLE  ALT=\"+pi%3Ct%3C3pi%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "a) 2 sqrt(13) /13<BR>\n" );
document.write( "b) 3 sqrt(13) /13<BR>\n" );
document.write( "c) -3/-2<BR>\n" );
document.write( "d) -7 sqrt(13) /-13<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 #563751 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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/cgi-bin/show-face.mpl?user=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=563751\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+tan%28t%29=12%2F5+ ALIGN=MIDDLE  ALT=\"+tan%28t%29=12%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+pi%3Ct%3C3pi%2F2+ ALIGN=MIDDLE  ALT=\"+pi%3Ct%3C3pi%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+tan%5E-1%2812%2F5%29=+1.176 ALIGN=MIDDLE  ALT=\"+tan%5E-1%2812%2F5%29=+1.176\"   DISABLED_style= \"max-width:90%; height:auto;\" > in radians\r<BR>\n" );
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document.write( "or\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+tan%5E-1%2812%2F5%29=+67.38%B0 ALIGN=MIDDLE  ALT=\"+tan%5E-1%2812%2F5%29=+67.38%B0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28t%2F2%29=cos%281.176%2F2%29=+cos%280.588%29=0.83205 ALIGN=MIDDLE  ALT=\"cos%28t%2F2%29=cos%281.176%2F2%29=+cos%280.588%29=0.83205\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "or\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28t%2F2%29=cos%2867.38%2F2%29=+cos%2833.69%29=0.83205 ALIGN=MIDDLE  ALT=\"cos%28t%2F2%29=cos%2867.38%2F2%29=+cos%2833.69%29=0.83205\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "your choices are:\r<BR>\n" );
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document.write( "a) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2sqrt%2813%29%2F13=0.5547 ALIGN=MIDDLE  ALT=\"2sqrt%2813%29%2F13=0.5547\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........excluded <BR>\n" );
document.write( "b) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%283sqrt%2813%29%2F13=0.83205%29 ALIGN=MIDDLE  ALT=\"highlight%283sqrt%2813%29%2F13=0.83205%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......your answer..<BR>\n" );
document.write( "c) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-3%2F-2=1.5 ALIGN=MIDDLE  ALT=\"-3%2F-2=1.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >.................excluded <BR>\n" );
document.write( "d) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-7sqrt%2813%29%2F-13=1.94145 ALIGN=MIDDLE  ALT=\"-7sqrt%2813%29%2F-13=1.94145\"   DISABLED_style= \"max-width:90%; height:auto;\" >.................excluded \r<BR>\n" );
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