defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Integral Calculus Indefinite Integrals

\(\rm \int {4dx\over e^x + e^{-x}}\) = ?

1

4 tan-1 ex+ C

2

4 sin-1 ex + C

3

4 cos-1 ex + C

4

4 cot-1 ex + C

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