Explanation: 
Another Explanation (5):
সমাধান:
ধরি, \(I = \int e^x (\sin x + \cos x) dx\)
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, \(I = \int e^x (\sin x + \cos x) dx = e^x \sin x + c\)
অতএব, \(\int e^x (\sin x + \cos x) dx = e^x \sin x + c\) 🥳🎉