document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1043443>Question 1043443</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a surveyor has measured a distance b=20m between points A and C on a river bank, as shown in the Examination Figure.  He wants to determine how far from the point A is a point B on the other bank of the river.  By an instrument called a theodolite, he can measure the angles A and C in the triangle ABC.  Of the angle A=25 degrees and the angle C=85 degrees, what is the distance AB? <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #658583 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=658583\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This needs to be drawn.<BR>\n" );
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document.write( "-25 deg----------------------85 deg<BR>\n" );
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document.write( "Angle B has to be 70 deg.<BR>\n" );
document.write( "Use Law of Sines<BR>\n" );
document.write( "a/sin A=b/sin B=c/sin C<BR>\n" );
document.write( "c/sin 85=20/sin 70<BR>\n" );
document.write( "c=20 sin 85/sin 70=21.20 m<BR>\n" );
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