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

prove that: tan^(2) phi+cot^(2) phi+2=sec^(2)phi cosec^(2) phi

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 phi cos ec phi=sec 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 : cos^(2)theta-sin^(2)theta=tan^(2)phi, "then" : cos^(2)phi-sin^(2)phi=

The value of tan^2 phi+ cot^2 phi- sec^2 phi cosec^2 phi is equal to:

tan^2phi-sec^2phi = ………………

If tan^(2)theta=1+2tan^(2)phi then show that cos2 theta+sin^(2)phi=0