The tide height at a beach is modeled by $h(t) = 5 \cos(t) + 5.5$. The height is $h(t)$ which is measured in feet and the time is $t$ measured in hours. When the tide height is 3 feet, what is the cosine of $t$? $\cos(t) = 1$ $\cos(t) = -\frac{1}{2}$ $\cos(t) = \frac{1}{2}$ $\cos(t) = 0$
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5 and we need to find the cosine of t when the tide height is 3 feet. Show more…
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