T
tcvqsc08


Tính tích phân:
[tex]I=\int\limits_{0}^{\frac{\pi}{4}}\frac{Cos^{3}x.dx}{Cos^{4}x-3Cos^{2}x+3}[/tex]

[tex]I=\int\limits_{0}^{\frac{\pi}{4}}\frac{Cos^{3}x.dx}{Cos^{4}x-3Cos^{2}x+3}[/tex]