document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=858170>Question 858170</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the angle sum formulas for sine and cosine to write tan&#8289;(&#956;+&#977;) in terms of sin&#8289;(&#956;),   sin&#8289;(&#977;),cos&#8289;(&#956;)and cos&#8289;(&#977;)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #517092 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=517092\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the angle sum formulas for sine and cosine to write tan&#8289;(&#956;+&#977;) in terms of sin&#8289;(&#956;), sin&#8289;(&#977;),cos&#8289;(&#956;)and cos&#8289;(&#977;) <BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "tan(u+v) = sin(u+v)/cos(u+v) <BR>\n" );
document.write( "= [sin(u)cos(v)+cos(u)sin(v)]/[cos(u)cos(v)-sin(u)sin(v)]<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "====================== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );