" 3."tan^(2)theta cos^(2)theta=1-cos^(2)theta

If 3cot theta=4 then show that (1-tan^(2)theta)/(1+tan^(2)theta)=(cos^(2)theta-sin^(2)theta)

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

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

Prove: (tan^(3)theta)/(1+tan^(2)theta)+(cot^(3)theta)/(1+cot^(2)theta)=sec theta cos ec theta-2sin theta cos theta

tan^(2)theta-tan^(2)(90^(@)-theta)=(sin^(2)theta-cos^(2)theta)/(sin^(2)theta cos^(2)theta)

If theta=30o, verify that: ( i )cos2 theta=(1-tan^(2)theta)/(1+tan^(2)theta)( ii) cos3 theta=4cos^(3)theta-3cos theta

If 0 le theta lt (pi)/(2) and cos theta+ cos^(2) theta+ cos^(3) theta=1 find the minimum value of tan theta .

(sin theta-2sin^(3)theta)/(2cos^(3)theta-cos theta)=tan theta

If tan^(4)theta +tan^(2) theta = 1 , then the value of cos^(4)theta +cos^(2)theta is-

3(cot^2 theta-cos^2 theta)= cos^2 theta, theta^@ यदि 3(cot^2 theta-cos^2 theta)= cos^2 theta, theta^@< theta<90^@ है, तो (tan^2 theta+ cosec^2 theta+sin^2 theta) का मान हैः