# Integral calc questions

1. Aug 5, 2011

### avleen

Hi, im studying for my integral exam in 2 weeks,andim trying really hard to understand a few calc questions which i really cant get how to solve,
e.g
(ALL these questions are integrations questions)
1)ln^n(x)
i tried to put 1.ln^n (X) but i cant seem to get the answer right
^^^^ this is a derivation

2) same with tan^n (x)

i dont know how to integrate sec^(any even or odd power) x

x/(a+bx )1/2. how is this equal to 2/3b^2(bx-2a)(a+bx)^1/2
how do i derive tan^n(x)

Sinx/sin(x+alpha)

2. Aug 5, 2011

### tiny-tim

welcome to pf!

hi avleen! welcome to pf!

(have a square-root: √ and try using the X2 icon just above the Reply box )