(1+sec theta-tan theta)/(1+sec varphi+tan theta)

(1+sec theta-tan theta)/(1+sec theta+tan theta)=

(1+sec theta - tan theta)/(1+sec theta + tan theta)=

prove that (sec theta-tan theta-1)/(sec theta+tan theta-1)=tan theta-sec theta

(sec theta+tan theta)/(sec theta-tan theta)+(sec theta-tan theta)/(sec theta+tan theta)

Prove that : (sec theta-tan theta)/(sec theta+tan theta)= 1-2 sec theta tan theta+ 2 tan^2 theta .

Prove that (sec theta-tan theta+1)/(sec theta+tan theta+1)=(1-sin theta)/(costheta) .

prove that (1)/(sec theta -tan theta) = sec theta + tan theta

Prove that (1)/(sec theta - tan theta) = sec theta + tan theta

Prove that: 1/(sec theta - tan theta) = sec theta + tan theta .

Prove the following identities: (sec-tan theta)/(sec theta+tan theta)=1-2sec theta tan theta+2tan^(2)theta