document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1181125>Question 1181125</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given: cos A = 3/5, tan B = 12/5, A is in Quadrant 1 and is in Quadrant 3<BR>\n" );
document.write( "Find<BR>\n" );
document.write( "1.Sin (A + B)<BR>\n" );
document.write( "2.Sin (A  -  B)<BR>\n" );
document.write( "3.Cos (A + B)<BR>\n" );
document.write( "4.Cos (A  -  B)<BR>\n" );
document.write( "5.Tan (A  -  B)<BR>\n" );
document.write( "6.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 #810963 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=810963\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos A = 3/5,  A is in Quadrant 1 <BR>\n" );
document.write( "sin A =4/5 , cos A = 3/5  , tan A =4/3\r<BR>\n" );
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document.write( "tan B = 12/5, quadrant IV\r<BR>\n" );
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document.write( "tan B = -12/5, sin B = -12/13 , cos B = 5/13\r<BR>\n" );
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document.write( "Sin (A + B) = sin(a)cos(b) + cos(a)sin(b)<BR>\n" );
document.write( " = (4/5)(5/13) +(3/5)(-12/13)<BR>\n" );
document.write( "= 20/65 - 36/65<BR>\n" );
document.write( "-16/65\r<BR>\n" );
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document.write( "sin(A − B) = sin A cos B − cos A sin B\r<BR>\n" );
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document.write( "=(4/5)(5/13) -(3/5)(-12/13)<BR>\n" );
document.write( "56/65\r<BR>\n" );
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document.write( "cos(A + B) = cos A cos B − sin A sin B <BR>\n" );
document.write( "cos(A − B) = cos A cos B + sin A sin B <BR>\n" );
document.write( "sin(A + B) = sin A cos B + cos A sin B \r<BR>\n" );
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document.write( "Plug values and continue\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );