Using the following identities:

a) cosh^2(t)-sinh^2(t) = 1.

(b) cosh^2(t) = (1+cosh(2t))/2

(c) d/dt (cosh(t)) = sinh(t). dt

(d) d/dt (sinh(t)) = cosh(t). dt

Using the identities in question 1, perform a suitable substitution with a hyperbolic function to calculate /(1 + 3:2)gdx. Trying to solve this with trigonometric substitution would be much more difcult. You do not need to simplify your answer. You'll need the following fact : z = sinh(t) t = ln(z + V22 | 1) Solution