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प्रश्न
Integrate the function in ex (sinx + cosx).
उत्तर
Let `I = int e^x (sin x + cos x) dx`
Put ex sin x = t
`=> (e^x cos x + e^x sin x) dx = dt`
`therefore e^x (sin x + cos x) dx = dt`
`therefore I = int dt = t + C`
`= e^x sin x + C`
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