Problem: y = ln|sec(x) + tan(x)| Attempted Solution: See Attachment I was hoping someone could identify my error and possibly write it out for me. At first I thought my steps were correct and everything was in order. However, when I checked my answer on WolframAlpha it gave me a slightly different result (actual answer is shown at the bottom of the attachment). Thanks! P.S: This was the source I consulted before attempting this: It could be possible that there's another technique I'm not aware of to solve such questions.