document.write( "Question 306101: Hello, I just started a section on trig and wanted to check with a pro to see how i'm doing.
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\n" ); document.write( "In the triangle ABC we have the sides: a=2.5, b=5.0, c=2.0. \r
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Algebra.Com's Answer #219130 by jesserose85(1)\"\" \"About 
You can put this solution on YOUR website!
cosB=a^2+c^2-b^2/2ac\r
\n" ); document.write( "\n" ); document.write( "Is this the right formula to use?
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