document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=951509>Question 951509</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Show the steps on how to prove of the following identity:<BR>\n" );
document.write( "tan (a + B) = tan a + tan B/ 1- tan a tan B </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #581097 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=581097\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Show the steps on how to prove of the following identity:<BR>\n" );
document.write( "tan (a + B) = tan a + tan B/ 1- tan a tan B<BR>\n" );
document.write( "***<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28a%2Bb%29=sin%28a%2Bb%29%2Fcos%28a%2Bb%29=%28sinacosb%2Bcosasinb%29%2F%28cosacosb-sinasinb%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "divide each term by cosacosb<BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28sinacosb%29%2F%28cosacosb%29%2B%28cosasinb%29%2F%28cosacosb%29%29%2F%28%28cosacosb%29%2F%28cosacosb%29-%28sinasinb%29%2F%28cosacosb%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28sina%29%2F%28cosa%29%2B%28sinb%29%2F%28cosb%29%29%2F%281-%28sinasinb%29%2F%28cosacosb%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28tana%2Btanb%29%2F%281-tanatanb%29 ALIGN=MIDDLE  ALT=\"%28tana%2Btanb%29%2F%281-tanatanb%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );