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Dengan memisalkan $u = \\tan\\left( \\dfrac{x}{2} \\right)$, hubungan antara $a$ dan $b$ yang tepat sehingga memenuhi persamaan $\\displaystyle \\int \\frac{a}{b \\cdot \\sin (x)+\\cos(x)-1}\\, dx = \\ln \\left|a\\cdot \\tan\\left(\\frac{x}{2}\\right)-1 \\right| +C$ adalah $\\ldots$.

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