Question

check work
int((tan(x)^3)sec(x))dx =
int((tan^2(x)tanxsecx)dx)=
int((sec^2(x)-1)tanxsecx)dx= let u=secx int(u^2-1)du= du=secxtanxdx
(u^3)/3-u+C =
sec^3x/3-secx+C
right?

Answer 1

nvm. yes it's correct

Answer 2

Indeed, it's correct. Congrats on the solution :-)