>The monthly average temperature T (in °C) in a certain city, may be approximated by T(t) = a cos (@(t-b) ) + c where t is the time in months, t = 0 corresponds to January 1 st, and we assume that function T(t) has a period of 12 months. a) Find a, o, b and c if T has a maximum of 22.4 °C in the middle of July (t = 6.5) and a minimum of - 10 °C. b) In which month is T minimum? %3D %3D

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