（解決済み）不定積分を求める

学術ゾーン
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$\displaystyle \int

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Pure trigonometric functions: find the fundamental frequency. Here everything is converted to x/2, then transformed into an integral of a rational function. This follows a fixed routine.

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So we take t = \\tan{\\left(\\dfrac{x}{2}\\right)}, right?

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https://baike.baidu.com/item/正切半角公式/22781837

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There are many tutorials on searching for Weierstrass substitution.

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For example https://math24.net/weierstrass-substitution.html

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Thank you very much