Consider indefinite integral:
$I = \int \mathrm{d}x \sqrt{2+\cos(x)+\cos(2x)}$
I was expecting simple result in terms of elliptic function. Unfortuntely, Mathematica spits out very ugly thing.
Can anyone give route for tidier expression?
2026-03-26 03:18:57.1774495137
Indefinite integral with trigonometric functions under square root
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