Find the integral: $\int (\sin x + \cos x) \, dx$
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $\sin x-\cos x + C$
We have
$\int (\sin x + \cos x) \, dx = \int \sin x \, dx + \int \cos x \, dx \text{}$
$= -\cos x + \sin x + C \text{}$