Recent content by neosonata

I see what I did wrong now, thank you.

Homework Statement Integrate from 0 to 1 x47e-x48 Homework Equations The Attempt at a Solution u = -x48 du = -48x47dx dx = du / -48x47 ∫eu * du/-48 -\frac{1}{48} ∫ eu du -\frac{1}{48} eu -\frac{1}{48} e1 - ( -\frac{1}{48} e0) -\frac{e}{48} +...

Ah that make sense.. silly me :p it should be (x/1-x^2) + tanh^(-1)x - (x/1-x^2) which leaves tanh^(-1)x Thanks for the help guys

Homework Statement Find the derivative. Simplify where possible. xtanh-1x + ln\sqrt{1-x^2}Homework Equations The Attempt at a Solution (x/1+x2) + tanh-1x - (x/1-x2)How would I go about make this problem simplified as possible if the above answer is correct.

Is it? Webassign is not accepting that answer for some reason.

Homework Statement Evaluate the indefinite integral. ∫sin(27t) (sec(cos 27t))^2 dt Homework Equations The Attempt at a Solution u = cos27t du = -27sin27t dx = du / -27sin27t ∫sin(27t)*(sec(u))^2 * (du/-27sin27t)(-1/27) ∫(sec(u))^2 du (-1/27)*tan(u) = (-1/27)*tan(cos27t) + C ? I am...