 minus half 1 minus 1 1 by 8 times 1 by 8 times Sir, we finished making What is the length then? I think I do not know So, root of that Yeah, so basically, second square s t square minus t side is at home this is the unit you start Yeah, third one So, from that second step it was plus x by 1 plus side to x Yeah And from there you have to substitute or take side x minus plus x Yeah, yeah, that is Instead of that But instead of doing the substitute just make 1 by sin x plus cos x and make it sin plus cos x or sin x plus cos x plus cos x cancels Right, I am going to do So, this will become derivative of this dx is equal to dt So, 2 sin x cos x is going to be 1 minus t square And if I add a minus t square I take it as k So, cos x minus sin x dx will be dk where it becomes I think this problem will not related to the cancer personally So, please complete it Now, we will I dp integration by points and that has come repeated once again Please complete it Now, I am going to start with integration by