document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=174475>Question 174475</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 6. find the exact value of trigonomic fucntion sec2x                    sin=3/5<BR>\n" );
document.write( "                                                                        cos=4/5 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #129488 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=129488\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Presumably you mean that sin x = 3/5 and cos x = 4/5.\r<BR>\n" );
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document.write( "Then, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+2x+=+2+%28cos+x%29+%5E2+-+1+ ALIGN=MIDDLE  ALT=\"cos+2x+=+2+%28cos+x%29+%5E2+-+1+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+2x+=+2%2A%284%2F5%29%5E2+-1+ ALIGN=MIDDLE  ALT=\"cos+2x+=+2%2A%284%2F5%29%5E2+-1+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+2x+=+2%2A16%2F25+-1 ALIGN=MIDDLE  ALT=\"cos+2x+=+2%2A16%2F25+-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+2x+=+32%2F25+-+1 ALIGN=MIDDLE  ALT=\"cos+2x+=+32%2F25+-+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+2x+=+32%2F25+-+25%2F25+=+7%2F25 ALIGN=MIDDLE  ALT=\"cos+2x+=+32%2F25+-+25%2F25+=+7%2F25\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sec+2x+=+1%2F%28cos+2x%29+=+25%2F7+ ALIGN=MIDDLE  ALT=\"sec+2x+=+1%2F%28cos+2x%29+=+25%2F7+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "R^2  </SPAN>\n" );
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