Unformatted text preview: t . Write a formula for the manufacturer’s yearly revenue R ( t ) after t years. (This is 2.2.28). Verify the following identities. (This is 2.3.12). • sin 2 v + 1 sec 2 v = 1 • cos 3 t = 4 cos 3 t3 cos t • sin 4 x = 8 sin x cos 3 x4 sin x cos x • (1 + cos θ )(1cos θ ) = sin 2 θ Suppose that a high tide occurs at noon when the water level is 12 feet. Six hours later, a low tide with a water level of 5 feet occurs, and by midnight another high tide (12 feet) occurs. Assuming that the water level is periodic, ﬁnd a formula that gives the water level as a function of time. Then approximate the water level at 5:30 pm. (This is 2.3.58)....
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 Summer '08
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 Calculus, Geodesy, Even and odd functions, water level

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