document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=916108>Question 916108</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello I need help with given sinA= 4/5 cosB= 5/13 both A and B in quadrant I, find tan(A+B)<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 #555910 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=555910\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "sinA= 4/5\r<BR>\n" );
document.write( "\n" );
document.write( "sin^2A=16/25<BR>\n" );
document.write( "1-cos^2A=16/25<BR>\n" );
document.write( "cos^2A=9/25\r<BR>\n" );
document.write( "\n" );
document.write( "cos A = 3/5\r<BR>\n" );
document.write( "\n" );
document.write( "sin A / cos A = (4/5) / (3/5)\r<BR>\n" );
document.write( "\n" );
document.write( "tan A = 4/3\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "cosB= 5/13 \r<BR>\n" );
document.write( "\n" );
document.write( "tan B = 12/5\r<BR>\n" );
document.write( "\n" );
document.write( "tan(A + B) = [ tan A + tan B ] / [ 1 - tan A tan B] \r<BR>\n" );
document.write( "\n" );
document.write( "= (4/3 + 12/5) /(1-(4/3)(12/5))\r<BR>\n" );
document.write( "\n" );
document.write( "=(56/15)/(-33/15)\r<BR>\n" );
document.write( "\n" );
document.write( "=-56/33  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );