Recent content by needhelp17

the problem is in the image

I got to this point 1/(Sqrt[1+x^2](1-x^2)) http://https://www.physicsforums.com/attachment.php?attachmentid=15381&stc=1&d=1221187139

I have tried the problem 3 days ...I don't know what to do..this is like a college problem.. and I am still in high school

How do I solve this? sec[x]/(1-tan[x]^2)

Someone pliz can you solve this integral with the steps.. xln(x+(1+(1+x^2)^1/2)/(1-x^2)^2 the answer is... ln(x+(1+x^2)^1/2)/2(1-x^2) + 1/4(2)^1/2ln(((1+x^2)-x(2)^1/2)/ ((1+x^2)^1/2+x(2)^1/2)) but how do i get this answer? please a ineed the steps