`int (dx)/(x)=….`

int{f(x)+-g(x)}dx=int f(x)dx+-int g(x)dx

Integrate the following with respect to x. (i) int tan x dx " " (ii) int cot x dx " " (iii) int cosec x dx " " (iv) int sec x dx .

(i) int cosec x dx =____ (ii) int sec x dx= ____