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Sbdenney

  • 4 years ago

PLEASE HELP The rotating light on a lighthouse is 400 feet from a cliff. It completes one rotation every 10 seconds. The equation representing the distance, d, in feet that the center of the circle of light is from the lighthouse is d(t) = 400sec (πt/5). What is the period of d(t)? (Enter only the number.)

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  1. Sbdenney
    • 4 years ago
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    Turing test do you know?

  2. TuringTest
    • 4 years ago
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    If your just asking about the period I don't see why it gives the whole thing about distance. \[\sec x={1\over \cos x}\]and these functions in the form of \[A \cos(Bx+C)\] where the period is\[ {2\pi \over \left| B \right|}\]so the period of your function is \[{2\pi \over{\pi \over 5}}=10\]I just don't see what to do with the rest of the info.

  3. Sbdenney
    • 4 years ago
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    ok thanks IT WAS RIGHT

  4. TuringTest
    • 4 years ago
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    But why all the extra info... seems weird :/

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