document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131838>Question 1131838</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The angle of elevation to the top of a tower from point A on the ground is 18.6 degrees . From a point&#8203; B, 30.1 feet closer to the&#8203; tower, the angle of elevation is 21.3 degrees . What is the height of the&#8203; tower? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #748523 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=748523\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two right triangles sharing a vertical side and the right angle.\r<BR>\n" );
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document.write( "x, the distance from bottom of tower to point B<BR>\n" );
document.write( "y, distance to top of the tower from ground\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28tan%2821.3%29=y%2Fx%2Ctan%2818.6%29=y%2F%28x%2B30%29%29 ALIGN=MIDDLE  ALT=\"system%28tan%2821.3%29=y%2Fx%2Ctan%2818.6%29=y%2F%28x%2B30%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Solve the system to get y.\r<BR>\n" );
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document.write( "If you solve x in terms of y with one equation and substitute into the other equation, algebra steps should lead to:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28y=%2830%2Atan%2818.6%29%29%2F%281-tan%2818.6%29%2Ftan%2821.3%29%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28y=%2830%2Atan%2818.6%29%29%2F%281-tan%2818.6%29%2Ftan%2821.3%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "You can compute that. </SPAN>\n" );
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