document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1192652>Question 1192652</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Angles A and B are located in the first quadrant. If sin A = 5/13 and cosB = 3/5, determine the exact value of cos(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 #824535 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=824535\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Angles A and B are located in the first quadrant. If sin A = 5/13 and cosB = 3/5, determine the exact value of cos(A + B).  <BR>\n" );
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document.write( "Find cos(A) and sin(B) using <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%5E2%28x%29+%2B+cos%5E2%28x%29+=+1 ALIGN=MIDDLE  ALT=\"sin%5E2%28x%29+%2B+cos%5E2%28x%29+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Then, cos(A+B) = cos(A)*cos(B) - sin(A)*sin(B)<BR>\n" );
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