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যদি

\int \frac{d x}{a + b \cos x} = \frac{1}{\sqrt{a^{2} - b^{2}}} \cos^{- 1} \frac{b + a \cos x}{a + b \cos x} হ য়, \int_{o}^{x} \frac{d x}{a + b \cos x} এ র

মান হবে

\frac{2}{\sqrt{a^{2} - b^{2}}}

\frac{- 2}{\sqrt{a^{2} - b^{2}}}

\frac{1}{\sqrt{a^{2} - b^{2}}}

\frac{- 1}{\sqrt{a^{2} - b^{2}}}

\frac{π}{\sqrt{a^{2} - b^{2}}}

ANS : 5

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