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Show that f(x) = cos^(2) x is strictly d...

Show that `f(x) = cos^(2) x` is strictly decreasing on `(0, pi//2)`.

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cosx
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Knowledge Check

  • f(x) = Cos^(-1) x is decreasing in

    A
    (-1,0)
    B
    `(0,pi//2)`
    C
    (-1,1)
    D
    none

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