Can Someone Give Me The Correct Answer Was This Exercise?
Consider the function F defined on [0, pi / 4] by F (x) = [G (tan (x))-G (0)] with G (t) primitive g (t) and g (t) = 1 / (1 + t * t)
1) verify that F is differentiable on [0, pi / 4] and determine its derivative function.

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