.सद्ध कीजिए कि \( \int_{0}^{\pi / 2} \frac{\cos x d x}{1+\cos x+\sin x}=\frac{\pi}{4}-\frac{1}{2...
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.सद्ध कीजिए कि \( \int_{0}^{\pi / 2} \frac{\cos x d x}{1+\cos x+\sin x}=\frac{\pi}{4}-\frac{1}{2} \log _{e} 2 \)
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