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agillogly Group Title

Assume the graph of a function of the form y=ycos(k(x-b)) is given below. Which of the following are possible values for a,k, and b?

  • 2 years ago
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  1. agillogly Group Title
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    • 2 years ago
  2. agillogly Group Title
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    a- a=4, k=1/2, b=-pi/4 b- a=2,k=4,b=pi/4 c- a=4,k=2,b=pi/4 d- a=4,k=2,and b=-pi/4

    • 2 years ago
  3. dpaInc Group Title
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    in your question, i'm assuming that second y is supposed to be an "a"....

    • 2 years ago
  4. agillogly Group Title
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    I thought the same thing, but there is no a in the equation, which is part of why I can't figure it out.

    • 2 years ago
  5. dpaInc Group Title
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    according to the choices, i'm pretty sure it is an "a" ...

    • 2 years ago
  6. dpaInc Group Title
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    you can eliminate B

    • 2 years ago
  7. agillogly Group Title
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    • 2 years ago
  8. dpaInc Group Title
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    since the peiod is pi, k=2 because period=2pi/k

    • 2 years ago
  9. dpaInc Group Title
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    so your choices are either C or D....

    • 2 years ago
  10. agillogly Group Title
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    So it depends on if b is negative or positive. I think its C?

    • 2 years ago
  11. dpaInc Group Title
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    you're right...:)

    • 2 years ago
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