#what did i do wrong? ( calculus )
warped eagleBOT
dreamy knot
You seem to have differentiated sec(t) to -sec(t)tan(t), which isn't correct.
Or if you're using the method where you put the negative signs right in the derivative/integral table, you don't need to do it again when applying IBP
polar wing
the derivative of sec(t) is positive sec(t)tan(t)
timid badge
I didn’t understand what you did actually so here’s the solution
If you want to know how we did the sec^3(x) mention me and I’ll send it
dreamy knot
They did that and computed the integral of sec^3(x). Where they went wrong is just with signs in integration by parts.
Also please avoid posting whole solutions in general. It's not the end of the world here since what you did is essentially the same as them, but just keep it in mind 
timid badge
Also please avoid posting whole solutions in general. It's not the end of the wo...
I see, I didn’t understand their handwriting so I didn’t know. thank you for the info though I’ll keep it in mind