The area bounded by the curve $y=3cos x$ and x-axis between $x=0$ and $x=2 \pi $ is :
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 12
$y=3\cos x$
and,
as, $\int\limits_0^{\pi}|\cos x|dx=2$
$⇒\int\limits_0^{2\pi}|\cos x|dx=4$
$∴Area=3\int\limits_0^{2\pi}|\cos x|dx=3×4=12$