`1/(1-cos theta) + 1/(1+cos theta)`

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

(1-cos theta)(1+ cos theta)

1- (sin ^ (2) theta) / (1 + cos theta) + (1 + cos theta) / (sin theta) - (sin theta) / (1-cos theta) - (1) / (sec theta)

(1-Cos theta)(1+ Cos theta) =

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

Solve : If (1)/(cos theta)+(1)/(cos 3theta)=(1)/(cos 5theta)

Prove (cos ec theta-cot theta)^(2)=(1-cos theta)/(1+cos theta)

Prove the following identities: (cos ec theta-cot theta)^(2)=(1-cos theta)/(1+cos theta)

Prove that (1+cos theta)/(1-cos theta)+(1-cos theta)/(1+cos theta)=4cot theta*cos theta