Explanation: 
Another Explanation (5):
সমাধান:
ধরি, \(I = \int e^x (\cos x + \sin x) dx\)
আমরা জানি, \(\int e^x (f(x) + f'(x)) dx = e^x f(x) + c\)
এখানে, \(f(x) = \sin x\) এবং \(f'(x) = \cos x\)
সুতরাং, \(I = \int e^x (\cos x + \sin x) dx = e^x \sin x + c\)
অতএব, \(\int e^x (\cos x + \sin x) dx = e^x \sin x + c\) 🥳🥳