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Evaluate the integral ∫ cosht/sinh^2t(1+sinh^2t) by using the following two different methods: (a) make a substitution...

Evaluate the integral ∫ cosht/sinh^2t(1+sinh^2t) by using the following two different methods: (a) make a substitution to express the integrand as a rational function and nd its partial fraction decomposition (b) use properties of hyperbolic functions to simplify the integrand

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