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Your Question:
Variable stars are ones whose brightness varies periodically. The brightness of a certain star is modeled by the function
b(t) = 8.2 − 2.7 cos ((?/155)t)
where t is measured in days.
(a) Find the period.
days
(b) Find the maximum and minimum brightness.
days
(b) Find the maximum and minimum brightness.
| (minimum) |
| (maximum) |