document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=768377>Question 768377</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (1+cosA)(1+cosB)(1+ cosC) = (1-cosA)(1-cosB)(1-cosC)<BR>\n" );
document.write( "Show that one of the values of each member of this equality is sin A sinB sinC. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #468329 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=468329\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1+cosA)(1+cosB)(1+ cosC) = (1-cosA)(1-cos(B)(1-cos(C))<BR>\n" );
document.write( "member of this equality is sin A sinB sinC.<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "[(1+cosA)(1+cosB)(1+ cosC)]/[(1-cosA)(1-cosB)(1-cosC)]<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Multiply numerator and denominator by [(1+cosA)(1+cosB)(1+ cosC]<BR>\n" );
document.write( "to get::<BR>\n" );
document.write( "[(1+cosA)(1+cosB)(1+ cosC)]^2 /[sin^2(a)(sin^2(B)(sin^2(C)<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "etc.<BR>\n" );
document.write( "=====<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Sta H.<BR>\n" );
document.write( "==============\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );