Determine the limit of the trigonometric function (if it exists).

1. lim sin x / 5x

(x -> 0)

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(x -> 0)

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2. lim tan^2x / x

(x ->0)

3. lim cos x tan x / x

(x -> 0)

Below, find lim f(x+h) - f(x) / h

----------- (x->0)

1. f(x) = radical x

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