Cos(x)-cos(x-pi/3)=cos(x+pi/3)​

Zac wanted to determine the measure of r and of ? r in the triangle below. to fine the measure of r, zac sets up the problem.42^2 + 24^2 = r 2. determine whether zac set the problem up correctly.

The states that the process that have been occurring today have been occurring since earth formed. what is it?

Plz in a major hurry will give brainlest asapppppppppppppppppppwhich of these would best describe the process labeled p? absorption of heat absorption of elements formation of solar energy formation of new elements