A Level

MATHEMATICS · Single correct · A Level · Mathematics · Integration · Integration

Problem

\int \frac{dx}{e^x + e^{-x}} =

(A)

\tan^{-1}(e^{-x}) + c

(B)

\tan^{-1}(e^x) + c

(C)

\log(e^x - e^{-x}) + c

(D)

\log(e^x + e^{-x}) + c