int(tan phi-tan^(3)phi)/(1+tan^(3)phi)d O/

int(tan phi+tan^(3)phi)/(1+tan^(3)phi)d phi

The equation tan^(2)phi+tan^(6)phi=tan^(3)phi*sec^(2)phi is

(tan^(2)phi)/(1+tan^(2)phi)+(cosec ^(2)phi)/(sec^(2)phi+cosec^(2)phi)=1

Prove that (tan phi)/(1-cot phi)+(cot phi)/(1-tan phi)=1+tan phi+cot phi

If tan theta = cos2 alpha tan phi, prove that tan (phi - theta) = (tan^(2) alpha sin 2 phi)/(1+ tan^(2) alpha cos 2 phi)

If : sin (theta + phi) = 2 sin (theta - phi), "then" : tan theta = A) tan phi B) 2 tan phi C) 3 tan phi D) 4 tan phi

The value of (sec phi(1-sin phi)(sin phi+cos phi) (sec phi+tan phi))/(sin phi(1+tan phi)+cos phi(1+ cot phi)) is equal to :

If (a-b)sin (theta+phi)=(a+b)sin(theta-phi) and a tan. (theta)/(2)-b tan.(phi)/(2)=c , then

(sec phi-tan phi)^2 (1+sin phi)^2 div sin^2 phi =?

Let theta = tan^(-1) ( tan . (5pi)/4) " and " phi = tan^(-1) ( - tan . (2pi)/3) then