Maple gives wrong results?

Question:Maple gives wrong results?

Posted: zhangjf 52 Product: Maple

April 14 2014

restart;
evalf(Int(cosh(t)/(cosh((17/15)*t)+cosh(t)), t = 0 .. infinity));

5.210624833

evalf(int(cosh(t)/(cosh((17/15)*t)+cosh(t)), t = 0 .. infinity));

2.720144439

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