`int_(0)^(a)(d)/(x^(2)+a^(2))` का मान ज्ञात कीजिए।

Explanation

`int_(0)^(1)(1)/(x^(2)+1^(2))dx`
`=(1)/(a)[tan^(-1).(x)/(a)]_(0)^(a)=(1)/(a)[tan^(-1).(a)/(a)-tan^(-1)0]`
`=(1)/(a)[tan^(-1)1-0]=(pi)/(4a)`