Definite Integration Question 397
Question: $ \int_0^{\pi /3}{\cos 3xdx=} $
[SCRA 1980]
Options:
A) $ \pi $
B) 0
C) $ \frac{\pi }{2} $
D) $ \frac{\pi }{4} $
Show Answer
Answer:
Correct Answer: B
Solution:
Required value is $ [ \frac{\sin 3x}{3} ]_0^{\pi /3}=0 $ .