document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=927606>Question 927606</A>: <I><SPAN STYLE=\"word-break: break-all;\"> cos a = 4/9, a in Q1, and tan b = -5/4, b in Q2.<BR>\n" );
document.write( "Find sin (a+b), cos (a+b), tan (a+b) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #563111 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=563111\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos a = 4/9, a in Q1, and tan b = -5/4, b in Q2.<BR>\n" );
document.write( "Find sin (a+b), cos (a+b), tan (a+b)<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "sin(a+b) = sin(a)cos(b) + sin(b)cos(a)<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "cos(a+b) = cos*cos - sin*sin<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "tan = sin/cos </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );