In tropical regions, mosquito populations tend to fluctuate periodically over the course of a year. Suppose the mosquito population in a tropical region can be modeled by the function
A (t) = 80 cos( t) + 130, where A (t) represents the mosquito population (in
thousands) t weeks after the beginning of the year.
Approximately how many weeks after the beginning of the year does the mosquito
population equal 200 thousand? If the mosquito population equals 200 thousand more than
once during the year, select each instance.