Question: Evaluate using the substitution of Exercise 43. Data From Exercise 43 Show that if u = tanh(x/2), then For the first relation, use the identities

Evaluate using the substitution of Exercise 43.

dx 1 + cosh x S


Data From Exercise 43

Show that if u = tanh(x/2), then

cosh x = 1+u 1-4 sinh x = 2u 1-u dx = 2du 1- u

For the first relation, use the identities

sinh (1) ==(cosh x - 1), 2 osh (7) = (cosh x + 1)

dx 1 + cosh x S

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