Integrate the function in

Let I = 

Putting 

 

 

  I = 

= 

= 

= 

 I = ……….(i)

 I = 

= 

 I = 

 I =  ……….(ii)

For evaluating , putting 

 

 

 

= 

= 

= 

= ……….(iii)

Putting this value in eq. (ii),

I = 

 I = 

= 

 I =