Thank you so much Mr NonCommAlg
This result really surprised me ! (Surprised)
which doesn't make sense.
How does ?
Please clarify. Maybe there's some trig information I'm missing or something.
In fact, it can be known that the derivative of tangent is also
It depends on the way you learnt it ^^'
Another way to look at it:
ooh I see. Thanks!
One last question -
How do you integrate ? Trig sub and inverse trig function integration seem not to work.
Well. In that case, I feel better! For a moment I felt like crap. :p