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vnchemistry73


[TEX]\int\limits_{\frac{\pi }{6}}^{\frac{\pi }{3}} {\sqrt {{{\tan }^2}x + {{\cot }^2}x - 2} } d{\rm{x}}[/TEX]
[TEX]\int\limits_{ - 1}^1 {\sqrt {{e^x} + {e^{ - x}} - 2} } d{\rm{x}}[/TEX]
[TEX]\int\limits_{ - 1}^1 {\sqrt {{e^x} + {e^{ - x}} - 2} } d{\rm{x}}[/TEX]
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