document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=859668>Question 859668</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the exact values of sin 2u , Cos 2u, and tan 2u using double angle formulas. <BR>\n" );
document.write( "1. csc u= 3, pi/2 < u > pi </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #517879 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=517879\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Find the exact values of sin 2u , Cos 2u, and tan 2u using double angle formulas. <BR>\n" );
document.write( "1. csc u= 3, pi/2 < u > pi; QII where x is negative and y is positive.<BR>\n" );
document.write( "sin(u) = 1/3; y = 1 and r = 3<BR>\n" );
document.write( "----------------------------------------<BR>\n" );
document.write( "x = -sqrt[9-1] = -sqrt(8)<BR>\n" );
document.write( "cos(u) = -sqrt(8)/3 = -(2/3)sqrt(2)<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "tan(u) = y/x = -1/sqrt(8)<BR>\n" );
document.write( "===========<BR>\n" );
document.write( "Your Problems:<BR>\n" );
document.write( "sin(2u) = 2sin(u)cos(u) = 2[1/3][-sqrt(8)/3]<BR>\n" );
document.write( "---<BR>\n" );
document.write( "cos(2u) =  cos^2(u)-sin^2(u)<BR>\n" );
document.write( "etc.<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "tan(2u) = [2tan(u)]/[1-tan^2(u)]<BR>\n" );
document.write( "=========<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "==============<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );