The temperature of a chemical reaction ranges between 40 degrees celsius and 180 degrees celsius. the temperature is at its lowest point when t = 0, and the reaction completes 1 cycle during a 12-hour period. what is a cosine function that models this reaction?
f(t) = 70 cos 12t + 110
f(t) = 110 cos 12t + 70
f(t) = −70 cos pi over 6t + 110
f(t) = −110 cos pi over 6t + 70