int(1)/(tan x tan(60^(@)-x)tan(60^(@)+x))dx

int(1)/(Tan x Tan(60^(0)-x)tan(60^(@)+x))dx= (1) (1)/(3)log|sin3x|+cquad (2) 3log|sin3x|+cquad (3) (1)/(2)log|sin3x|+cquad (4) (1)/(3)log|cos3x|+cquad

int(dx)/(1-tan x)

Evaluate int(tan x+tan^(3)x)/(1+tan^(3)x)dx

tan x * tan (60 ^ (@) + x) * tan (60 ^ (@)-x) = tan3x

If tan51^(@)-2tan12^(@)=tan x^(@) and tan theta*tan(60^(@)-theta)*tan(60^(@)+theta)=tan x then the minimum positive value of theta is equal to

(iii) Prove that tan x tan(60-x)tan(60+x)=tan3x

int (1+tan x )/(1-tan x)dx

int(2tan x)/(1+tan^(2)x)dx

int(tan^(3)x-x tan^(2)x)dx

int dx/(1+tan x)