Evaluate \(\int \sin 3x \mathrm d x\)
A
(2/3) cos 3x + c
B
(1/3) cos 3x + c
C
(-1/3) cos 3x + c
D
(-2/3) cos 3x + c
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
\(\int \sin 3x \mathrm d x = - \frac{\cos 3x}{3} + c\)
= \(-\frac{1}{3} (\cos 3x) + c\)
Source: Myschool Past Questions Archive (Record #3338)