document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1076881>Question 1076881</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the length of side A, in the triangle of A = 25°, b = 28, a = 18? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #691483 by </B><A HREF=/tutors/aboutme.mpl?userid=Herdaysoji><B>Herdaysoji(25)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Herdaysoji><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=Herdaysoji><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=691483\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First sine rule; (sinA/a)=(sinB/b) cross multiplication<BR>\n" );
document.write( "sinB=(sinA*b)/a=(sin25*28)/18=(0.4226..*28)/18<BR>\n" );
document.write( "sinB=11.8333/18=0.6574<BR>\n" );
document.write( "B=(sin^-1)0.6574=41.1<BR>\n" );
document.write( ".'.A+B+C=180.'.28+41+C=180<BR>\n" );
document.write( "C=180-28-41=111<BR>\n" );
document.write( "using cosine rule to get c<BR>\n" );
document.write( "(c^2)=(a^2)+(b^2)-2ab(cosC)<BR>\n" );
document.write( "(c^2)=(18^2)+(28^2)-2*18*28 (cos111)<BR>\n" );
document.write( "(c^2)=324+784-(1008*-0.3584)<BR>\n" );
document.write( "(c^2)=1108-(-3.61.234.....)<BR>\n" );
document.write( "(c^2)=1108+361.234....<BR>\n" );
document.write( "(c^2)=1469.234.. <BR>\n" );
document.write( "c=square root(1469.234....)<BR>\n" );
document.write( "c=38.330..... </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );