document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1194315>Question 1194315</A>: <I><SPAN STYLE=\"word-break: break-all;\">  If tan A = ¾ and cos B = 12/13, find<BR>\n" );
document.write( "a. Tan (A  -  B)<BR>\n" );
document.write( "b. c. tan ( B  -  A )<BR>\n" );
document.write( "c. Sin ( A + B)<BR>\n" );
document.write( "d. cos 2A </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #826500 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=826500\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  If tan A = ¾ and cos B = 12/13, find<BR>\n" );
document.write( "a. Tan (A  -  B)<BR>\n" );
document.write( "b. c. tan ( B  -  A )<BR>\n" );
document.write( "c. Sin ( A + B)<BR>\n" );
document.write( "d. cos 2A<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "tan(A) = 3/4<BR>\n" );
document.write( "tan = y/x<BR>\n" );
document.write( "r = sqrt(x^2 + y^2) = 5<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "sin = y/r<BR>\n" );
document.write( "cos = x/r<BR>\n" );
document.write( "cot = 1/tan<BR>\n" );
document.write( "sec = 1/cos<BR>\n" );
document.write( "csc = 1/sin<BR>\n" );
document.write( "----<BR>\n" );
document.write( "cos(B) = 12/13 = x/r ---> y = 5<BR>\n" );
document.write( "sin = y/r<BR>\n" );
document.write( "cos = x/r<BR>\n" );
document.write( "tan = y/x<BR>\n" );
document.write( "cot = 1/tan<BR>\n" );
document.write( "sec = 1/cos<BR>\n" );
document.write( "csc = 1/sin<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "a. Tan (A  -  B)<BR>\n" );
document.write( "b. c. tan ( B  -  A )<BR>\n" );
document.write( "c. Sin ( A + B)<BR>\n" );
document.write( "d. cos 2A<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Look up formulas at Wikipedia \"Half angle formulas\"<BR>\n" );
document.write( "----  Email via the TY note for help or to check your work. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );