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

Prove that cot 2 theta + tan theta = cosec 2 theta

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: tan 8theta - tan 6theta - tan 2theta = tan 8theta \ tan 6theta \ tan 2theta .

Prove that : tan 4 theta = (4 tan theta - 4 tan^3 theta)/(1-6 tan^2 theta + tan^4 theta) .

Solve tan theta + tan 2 theta + tan theta * tan 2 theta * tan 3 theta=1

If "tan" 2 theta "tan" theta =1, "then" theta =

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

Prove that (1 - cos 2 theta)/( sin 2 theta) = tan theta.

If theta is an acute angle and tan theta + sec theta = 1.5 , find sin theta, tan theta and sec theta .

Prove that cos theta (tan theta +2) (2tan theta +1) = 2 sec theta + 5 sin theta