`tan(theta+135^@)tan(theta-135^@)`

tan 135^@

Prove the following identity: quad tan theta tan(theta+60^(@))+tan theta tan(theta-60^(@))+tan(theta+60^(@))tan(theta-60^(@))=

Prove any of the following: tan (45^@+theta)tan (135^@+theta)=-1

(tan(theta+varphi)+tan(theta-varphi))/(1-tan(theta+varphi)tan(theta-varphi))=tan2 theta

(cot theta)/(cot theta-cot3 theta)+(tan theta)/(tan theta-tan3 theta) is equal to

(cot theta)/(cot theta-cot3 theta)+(tan theta)/(tan theta-tan3 theta) is equal to:

If tan theta + tan(60^(@)+theta)+tan (120^(@)+theta)=3 , then theta =

If tan theta + tan (60^@+ theta) + tan (120^@ + theta)=3 then theta =

If tan theta + tan 2theta + sqrt(3) tan theta tan 2theta = sqrt(3) then theta =