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? options: a f(t) = 70 cos (12t) + 110 b f(t) = 110 cos (12t) + 70 c f(t) = −70 cos (pi over 6t) + 110 d f(t) = −110 cos (pi over 6t) + 70