int_0^pi x log(sin x) , dx = | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) ધારો કે $I = \int_0^\pi x \log(\sin x) \, dx$ ..... $(i)$ ગુણધર્મ $\int_0^a f(x) \, dx = \int_0^a f(a-x) \, dx$ નો ઉપયોગ કરતા: $I = \int_0^\pi (\p

Vedclass · Accepted Answer

$\frac{\pi^2}{2} \log(\frac{1}{2})$

Vedclass · Answer

(B) ધારો કે $I = \int_0^\pi x \log(\sin x) \, dx$ ..... $(i)$ ગુણધર્મ $\int_0^a f(x) \, dx = \int_0^a f(a-x) \, dx$ નો ઉપયોગ કરતા: $I = \int_0^\pi (\pi - x) \log(\sin(\pi - x)) \, dx = \int_0^\pi (\pi - x) \log(\sin x) \, dx$ ..... $(ii)$ $(i)$ અને $(ii)$ નો સરવાળો કરતા: $2I = \int_0^\pi (x + \pi - x) \log(\sin x) \, dx = \pi \int_0^\pi \log(\sin x) \, dx$ ગુણધર્મ $\int_0^{2a} f(x) \, dx = 2 \int_0^a f(x) \, dx$ નો ઉપયોગ કરતા જો $f(2a-x) = f(x)$ હોય: $2I = 2\pi \int_0^{\pi/2} \log(\sin x) \, dx$ $I = \pi \int_0^{\pi/2} \log(\sin x) \, dx$ આપણે જાણીએ છીએ કે $\int_0^{\pi/2} \log(\sin x) \, dx = -\frac{\pi}{2} \log 2 = \frac{\pi}{2} \log(\frac{1}{2})$. તેથી,$I = \pi \left( \frac{\pi}{2} \log(\frac{1}{2}) \right) = \frac{\pi^2}{2} \log(\frac{1}{2})$.

$\int_0^\pi x \log(\sin x) \, dx = $

Similar Questions

જો $f(x) = \cos(\tan^{-1}x)$ હોય,તો સંકલન $\int_{0}^{1} x f''(x) dx$ ની કિંમત શોધો.

$\int_{-1}^1 \left(\sqrt{1+x+x^2}-\sqrt{1-x+x^2}\right) dx =$

$\int\limits_{ - 1}^1 {\frac{{{x^3} + |x| + 1}}{{{x^2} + 2|x| + 1}}} dx = a \ln 2 + b$,તો:

નિશ્ચિત સંકલનનું મૂલ્ય શોધો: $\int_0^\pi \frac{x \cos^2 x}{1+\sin x} dx$

$\int_{\pi / 5}^{3 \pi / 10} \frac{d x}{\sec ^2 x+\left(\tan ^{2022} x-1\right)\left(\sec ^2 x-1\right)}=$

Vedclass Test Series

Exam Paper Generator

Online Exam Module