Need some help soving this double integral:
integral sign (0 to 1) integral sign (tan^-1(y) to pi/4) secx dxdy.
Please bear with my notation.
Help will be appreciated.
Well i actually did get that far, and got
integral sign (0 to 1) ln(sqrt2 +1)+ln((sec(tan)^-1(y)) +y) dy
then i used the identity (tan(x))^2+1 = (sec(x))^2 to get ,
integral sign (0 to 1) ln(sqrt2+1) - ln(sqrt(y^2+1) +y) dy
this is where i got stuck. Do i proceed using by parts ?