\[\int_{{}}^{{}}{\frac{1}{{{({{e}^{x}}+{{e}^{-x}})}^{2}}}\ dx=}\] – McqOptions

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1.	\[\int_{{}}^{{}}{\frac{1}{{{({{e}^{x}}+{{e}^{-x}})}^{2}}}\ dx=}\]
A.	\[-\frac{1}{2({{e}^{2x}}+1)}+c\]
B.	\[\frac{1}{2({{e}^{2x}}+1)}+c\]
C.	\[-\frac{1}{{{e}^{2x}}+1}\]
D.	None of these
Answer» B. \[\frac{1}{2({{e}^{2x}}+1)}+c\]

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