tan(theta+135^(@))tan(theta-315^(@))=-1

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

Prove that Tan(theta + 135^(@)) Tan(theta-135^(@)) = - 1

[[1, -tan((theta)/(2))], [tan((theta)/(2)), 1]][[1, tan((theta)/(2))], [-tan((theta)/(2)), 1]]^(-1)=

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

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

If A = [(1,-tan""(theta)/(2)),(tan""(theta)/(2), 1)] and B = [(1,tan""(theta)/(2)),(-tan""(theta)/(2), 1)] show that, AB^(-1) = [(costheta,-sin theta),(sin theta, cos theta)] .

Prove: (tan^(3)theta-1)/(tan theta-1)=sec^(2)theta+tan theta .

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

If [(1,-tan theta),(tan theta,1)][(1,tan theta),(-tan theta,1)]^(-1)=[(a,-b),(b,a)], then

If ((1,-tan theta ),(tan theta,1))((1,tan theta ),(-tan theta ,1))^(-1) = ((a,-b),(b,a)) then :