document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1005715>Question 1005715</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose cos&#952;= 2/5 and &#952; is in quadrant IV.\r<BR>\n" );
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document.write( "Use the Fundamental Trigonometric Identities to find sin &#952;. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621893 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=621893\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Suppose cos&#952;= 2/5 and &#952; is in quadrant IV. <BR>\n" );
document.write( "Use the Fundamental Trigonometric Identities to find sin &#952;. <BR>\n" );
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document.write( "Note: x is positive and y is negative in QIV.<BR>\n" );
document.write( "By definition cos(t) = x/r<BR>\n" );
document.write( "So, x = 2 and r = 5<BR>\n" );
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document.write( "Then y = -sqrt[5^2-2^2] = -sqrt(21)<BR>\n" );
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document.write( "Ans: sin(t) = y/r = -sqrt(21)/5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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