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$\int_{π / 2}^{3 π / 2} \frac{1}{1 + \cos x} d x$

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Correct option is B

G.I =∫π/23π/2 12cos2⁡x2dx=12∫π/23π/2 sec2⁡x2dx=122⋅tan⁡x2π/23π/2=tan⁡3π4−tan⁡π4=−1−1=−2

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∫π/23π/211+cosxdx

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$\int_{π / 2}^{3 π / 2} \frac{1}{1 + \cos x} d x$