document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1103528>Question 1103528</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if tan theta=10/7, and if cos theta <0 then, <BR>\n" );
document.write( "sec theta=<BR>\n" );
document.write( "cos theta=<BR>\n" );
document.write( "sin theta= <BR>\n" );
document.write( "tan theta/2=<BR>\n" );
document.write( "sin 2theta=<BR>\n" );
document.write( "sin theta/2=<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #718220 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=718220\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> if tan theta=10/7, and if cos theta <0 then<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "tan + and cos minus --> Q4 --> x is +, y is negative<BR>\n" );
document.write( "y = 10<BR>\n" );
document.write( "x = -7<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "tan = y/x<BR>\n" );
document.write( "r = sqrt(x^2+y^2) = sqrt(149)<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "cos theta= y/r = -10/sqrt(149)<BR>\n" );
document.write( "sec theta= 1/cos = -sqrt(149)/10<BR>\n" );
document.write( "-----\r<BR>\n" );
document.write( "\n" );
document.write( "sin theta= sqrt(1 = cos^2)  --- positive in Q4<BR>\n" );
document.write( "---<BR>\n" );
document.write( "tan theta/2= sin/cos<BR>\n" );
document.write( "==============================<BR>\n" );
document.write( "sin 2theta= 2sin*cos<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "sin theta/2= --- Look up \"Half Angle formulas\" on Wikipedia.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );