document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1022071>Question 1022071</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use trig identities and the given information to determine the exact value<BR>\n" );
document.write( "Secx= -8/5, pi <or equal to X <or equal to 3pi/2, find cosx </SPAN>\n" );
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document.write( "Use trig identities and the given information to determine the exact value<BR>\n" );
document.write( "Secx= -8/5, pi <= X <= 3pi/2, find cosx<BR>\n" );
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document.write( "By definition, sec = r/x<BR>\n" );
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document.write( "Since X is in QIII, x is negative::<BR>\n" );
document.write( "Therefore: r = 8 and x = -5<BR>\n" );
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document.write( "Then cos(x) = x/r = 1/sec(x) = 1/(-8/5) = -5/8<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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