1.

`sqrt(4-x^(2))`

Answer» माना `I=intsqrt(4-x^(2))dx=intsqrt(2^(2)-x^(2))dx`
`=(x)/(2)sqrt(4-x^(2))+(4)/(2)sin^(-1).(x)/(2)+C`
`=(x)/(2)sqrt(4-x^(2))+2sin^(-1).(x)/(2)+C`


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