I have question like that and i need to implement solution to python but i don't quite understand how it can doable can you help me?
If $f(x) = 5\tan(x) – 9x$, find the percentage error in $f(x)$ for $x=\frac{\pi}4$, if the error in $x$ is $0.003$.
2026-03-26 06:33:44.1774506824
Error percentage calculation in trigonometric functions
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Error propagation is usually done assuming linearity, so $\Delta (f(x))\approx \frac {df(x)}{dx}\Delta (x)$. You evaluate the derivative at the $x$ of interest.