" (iii) Prove that: "cos^(2)theta(1+tan^(2)theta)=1

prove that cos^2theta(1 + tan^2 theta) = 1

Prove that: cos^2theta(1+tan^2theta)=1 .

tan theta+(1)/(tan theta)=2 then prove that tan^(2)theta+(1)/(tan^(2)theta)=2

Prove that : (1 - tan^(2) theta)/(1 + tan^(2) theta) = cos^(2) theta - sin^(2) theta

Prove that (tan^(2)theta-1)/(tan^(2)theta+1)=1-2cos^(2)theta

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

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

Prove: tan^2thetacos^2theta=1-cos^2theta

Prove :tan^(2)theta cos^(2)theta=1-cos^(2)theta

Prove that (cos^(2) theta)/(1-tan theta)+(sin^(3) theta)/(sin theta - cos theta) =1 + sin theta cos theta .