Questions: Find the average value of the function (f(x)) in the interval ([-π, π]).
(f(x)=sin^3 x cos^3 x)
Transcript text: Find the average value of the function $f(x)$ in the interval $[-\pi, \pi]$.
\[
f(x)=\sin ^{3} x \cos ^{3} x
\]
Solution
Find the average value of the function \( f(x) = \sin^3 x \cos^3 x \) over the interval \([- \pi, \pi]\).
Calculate the integral of the function over the interval.
The integral of \( f(x) \) from \( -\pi \) to \( \pi \) is given by:
\[
\int_{-\pi}^{\pi} \sin^3 x \cos^3 x \, dx = 0
\]
This is because the function \( f(x) \) is an odd function, and the integral of an odd function over a symmetric interval around zero is zero.
Determine the average value of the function.
The average value \( \text{Avg}(f) \) is calculated as:
\[
\text{Avg}(f) = \frac{1}{\pi - (-\pi)} \int_{-\pi}^{\pi} f(x) \, dx = \frac{1}{2\pi} \cdot 0 = 0
\]
The average value of the function is \( \boxed{0} \).
The average value of the function \( f(x) = \sin^3 x \cos^3 x \) over the interval \([- \pi, \pi]\) is \( \boxed{0} \).