document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=61331>Question 61331</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am a grade 10 students and i like trigonometry but i found this quiet tough.Plz can u solve it for me..<BR>\n" );
document.write( "prove that (sec4a-1)/(sec8a-1)=tan4a/tan2a </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #42289 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=42289\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I am a grade 10 students and i like trigonometry but i found this quiet tough.Plz can u solve it for me..<BR>\n" );
document.write( "prove that (sec4a-1)/(sec8a-1)=tan4a/tan2a<BR>\n" );
document.write( "FEW THINGS , I WANT TO KNOW..<BR>\n" );
document.write( "1.IN 10 TH. GRADE ARE YOU TAUGHT MULTIPLE ANGLES.ASSUMING SO..<BR>\n" );
document.write( "2.HAVE YOU TYPED THE PROBLEM CORRECTLY?IT DOES NOT APPEAR SO..GOR EXAMPLE TRY FOR A=15 DEGREES<BR>\n" );
document.write( "LHS = [SEC(60)-1]/[SEC(120)-1]= 1/-3=-1/3<BR>\n" );
document.write( "RHS = TAN(60)/TAN(30)= SQRT(3)/[1/SQRT(3)]=3...<BR>\n" );
document.write( "SO THE PROBLEM IS NOT CORRECT....<BR>\n" );
document.write( "3.ANY WAY LET US KEEP LHS IN TACT AND FIND IT OUT INTERMS OF TAN MULTIPLE ANGLES\r<BR>\n" );
document.write( "\n" );
document.write( "LHS =[{1-C0S(4A)}/{COS(4A)}]/[{1-COS(8A)}/{COS(8A)}]<BR>\n" );
document.write( "= 2SIN^2(2A)*COS(8A)/[2SIN^2(4A)COS(4A)]<BR>\n" );
document.write( "=[{2SIN^2(2A)COS(8A)}]/[{2SIN(4A)COS(4A)}{SIN(4A)}]<BR>\n" );
document.write( "=[2SIN^2(2A)COS(8A)]/[{SIN(8A)}{2SIN(2A)COS(2A)}]<BR>\n" );
document.write( "= TAN(2A)/TAN(8A)....IS THE ANSWER<BR>\n" );
document.write( "OK? GOT IT?.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );