

m.n giúp mình với ạ
[tex]a) \int_{0}^{\frac{\pi }{2}}\left \lfloor \frac{1}{cos^{2}(cosx)} - tan^{2}(sinx) \right \rfloor dx[/tex]
[tex]b) \int_{0}^{\frac{\pi }{4}} (sin^{6}x+cos^{6}x).ln(1+tanx).dx[/tex]
[tex]c) \int_{0}^{2\pi }\frac{x.sinx}{3+cosx}.dx[/tex]
[tex]a) \int_{0}^{\frac{\pi }{2}}\left \lfloor \frac{1}{cos^{2}(cosx)} - tan^{2}(sinx) \right \rfloor dx[/tex]
[tex]b) \int_{0}^{\frac{\pi }{4}} (sin^{6}x+cos^{6}x).ln(1+tanx).dx[/tex]
[tex]c) \int_{0}^{2\pi }\frac{x.sinx}{3+cosx}.dx[/tex]