6) `int dx/(1-tanx)`

int 1/(1- tanx) dx=

int 1/(1+tanx) dx

int 1/(1+tanx) dx

Ecaluate the following: (i) int(sec^(2)x)/(3+tanx)dx " (ii) " int(e^(x)-e^(-x))/(e^(x)+e^(-x))dx (iii) int(1-tanx)/(1+tanx)dx " (iv) " int(1)/(1+e^(-x))dx

(i) int (1-tanx)/(1+tanx) dx (ii) int (1- cot x)/(1+ cot x) dx

Evaluate int sec^2x/(1+tanx)^(3/2)dx

Evaluate int sec^2x/(1+tanx)^2dx

Evaluate: int1/(1-tanx)\ dx

int ((1+tanx)/(1-tanx))dx