How can i do this?

Does anyone know how i can rearrange x(sec^2)3x to  3x(1+tanx)?

This may not be possible, however it probably is.

Thanks, anon

obviously not true

let x = pi/4

3x^2(sec^2x) = 3pi^2/8

3x(1 + tanx) = 6pi

If you plot y = x*sec(3*x)^2 - 3*x*(1+tan(x)), you'll see it's not the same as y=0, so it's not possible.