The Law of Cosines is used to find the remaining parts of an oblique (non-right) triangle when either the lengths of two sides and the measure of the included angle is known (SAS) or the lengths of the three sides (SSS) are known. The Law of Cosines states: ... c2=a2+b2−2ab cosC .
If you are asking “k=3*2+5x-6 and m=-2*2-6x+7 then k-m=?”:
11
Not expensive/inexpensive
