Prove that : `1+tan theta tan 2theta = sec 2theta`.

prove that 1+tan theta tan2 theta=sec2 theta

Prove that : 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 that (tan 8 theta)/(tan theta)=(1+ sec 2 theta)(1+ sec 4 theta)(1+ sec 8 theta)

Prove that (1+ tan^4 theta)/(1+ tan^2 theta) = sec ^2 theta-2 sin^2theta

prove that : (tan 2^n theta)/(tan theta) = (1+sec 2theta) (1+ sec 2^2 theta) (1+sec 2^3 theta) … (1+ sec 2^n theta)

Prove that (tan8 theta)/(tan theta)=(1+sec2 theta)(1+sec4 theta)(1+sec8 theta)

Prove that: "tan"3 theta tan 2theta tan theta="tan" 3theta-"tan" 2theta-"tan" theta.

Prove that : tan^(4)theta + tan^(2)theta = sec^(4)theta - sec^(2) theta