Can we apply the fundamental theorem of calculus to an integrand that's a function of the differentiating variable?(adsbygoogle = window.adsbygoogle || []).push({});

For example, can one still use the fundamental theorem of calculus when trying to find the derivative of this function:

[tex]f(x) = \int_{0}^{x} \frac{cos(xt)}{t}dt[/tex]

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# The fundamental theorem of calculus

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