KMK: how to set up the c^2 formula in the law of cosines
c
2=a
2+b
2-(2abCosC)
the first bit is just like pythagoras, then there is a - sign, then you have to use the 2ab all over again, but the 2 is not a power this time,.then lastly you put cosC on the end.
The capital letter at the end is the same as the little letter at the beginning.
Is that what you wanted?
+118654 
