document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=684448>Question 684448</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the triangle using the given information.<BR>\n" );
document.write( "a=7cm<BR>\n" );
document.write( "b=4cm<BR>\n" );
document.write( "c=5cm<BR>\n" );
document.write( "How do I find the angles? Law of cosines? <BR>\n" );
document.write( "Please provide all steps. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #424099 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=424099\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a^2 = b^2 + c^2 - 2*b*c*cos(A)\r<BR>\n" );
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document.write( "49 = 4^2 + 5^2 - 2*4*5*cos(A)\r<BR>\n" );
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document.write( "49 = 16 + 25 - 40*cos(A)\r<BR>\n" );
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document.write( "49 = 41 - 40*cos(A)\r<BR>\n" );
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document.write( "49 - 41 = -40*cos(A)\r<BR>\n" );
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document.write( "8 = -40*cos(A)\r<BR>\n" );
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document.write( "8/(-40) = cos(A)\r<BR>\n" );
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document.write( "-1/5 = cos(A)\r<BR>\n" );
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document.write( "cos(A) = -1/5\r<BR>\n" );
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document.write( "A = arccos(-1/5)\r<BR>\n" );
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document.write( "A = 101.536959\r<BR>\n" );
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document.write( "So the angle A is roughly 101.536959 degrees.\r<BR>\n" );
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document.write( "I'll let you find angles B and C\r<BR>\n" );
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