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pprecalc

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the function is one of the form y=g(x) +cosbx. find two linear functions y1 and y2 related to g such that y1 is less than or equal to y is less than or equal to y2.

a. y= 2x + cos x
b. y= 1-0.5x+ cos2x

  • pprecalc -

    since -1 <= cosx <= 1

    (a) 2x-1 <= y <= 2x+1
    (b) 1-.05x-1 <= y <= 1-.05x+1
    or, -.05x <= y <= 2-.05x


    visit

    http://rechneronline.de/function-graphs/

    and play around some to see

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