document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1197936>Question 1197936</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the sides of an ABC triangle are, a=5,b=6, and c=7, what is the value of angle C? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #831397 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3816)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><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=831397\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "Law of Cosines<BR>\n" );
document.write( "c^2 = a^2+b^2 - 2ab*cos(C)<BR>\n" );
document.write( "7^2 = 5^2+6^2 - 2*5*6*cos(C)<BR>\n" );
document.write( "49 = 61 - 60*cos(C)<BR>\n" );
document.write( "cos(C) = (49-61)/(-60)<BR>\n" );
document.write( "cos(C) = 0.2<BR>\n" );
document.write( "C = arccos(0.2)<BR>\n" );
document.write( "C = 78.4630409671846\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "Answer: Angle C is approximately 78.463 degrees<BR>\n" );
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