Integrate a function

1. integrate sqrt(2+sin(x)) from x=1.1 to x=3.3

Integrate[ Sqrt[2+Sin[x]], {x,1.1,3.3} ]

2. integrate sqrt(2+sin(x)) from x=a to x=b   (variables without assigned values)

Integrate[ Sqrt[2+Sin[x]], {x, a, b} ]


3. indefinite integral of sqrt(2+sin(x))

Integrate[ Sqrt[2+Sin[x]], x ]