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pre-cal

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consider y=-2+5cos(20x-5pie)
the period is?
the frequency is?
the vertical shift is?
the horizontal shift is?

  • pre-cal -

    more standard form

    y = 5 cos 20(x - π/4) - 2

    period = 2π/20 = π/10
    frequency is 20 cosine curves per 2π radians
    vertical shift : 2 units down
    horizontal shift: π/4 to the right

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