document.write( "Question 1042353: Solve the triangle ABC. (using the law of cosines)\r
\n" ); document.write( "\n" ); document.write( "a=10,b=12,c=16 \n" ); document.write( "

Algebra.Com's Answer #657332 by ikleyn(52786) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "Solve the triangle ABC. (using the law of cosines)\r
\n" ); document.write( "\n" ); document.write( "a=10,b=12,c=16
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "This assignment is to find the angles of the given triangle.\r\n" );
document.write( "\r\n" );
document.write( "Use the Law of Cosines.\r\n" );
document.write( "\r\n" );
document.write( " = ,   or\r\n" );
document.write( "\r\n" );
document.write( " = ,   or\r\n" );
document.write( "\r\n" );
document.write( "256 = 100 + 144 - 240*cos(C),   or\r\n" );
document.write( "\r\n" );
document.write( "256 - 100 - 144 = - 240*cos(C),   or\r\n" );
document.write( "\r\n" );
document.write( "12 = -240*cos(C),   or\r\n" );
document.write( "\r\n" );
document.write( "cos(C) =  = .   --->  angle C =  =    (an obtuse angle).\r\n" );
document.write( "\r\n" );
document.write( "Doing by the same way, find cos(B) and cos(C).\r\n" );
document.write( "\r\n" );
document.write( "This is the way.\r\n" );
document.write( "

\n" ); document.write( " \n" ); document.write( "

\n" );