Texas HS Precalculus Question of the Day

Daily challenge for Texas HS Precalculus. Test yourself and track progress.

Average temperature in Austin typically varies from 45°F in January to 85°F in July and repeats every 12 months. Let $t$ be months after January ($t=0$ in January). What sinusoidal function $T(t)$ models this temperature variation (in °F)?

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