सिद्ध कीजिए कि : `sqrt((1 + cos A)/(1 - cos A )) +sqrt((1 - cos A)/(1 + cos A)) = 2" cosec "A`

sqrt ((1-cos A) / (1 + cos A)) = cos ecA-cot A

sqrt((1-cos A)/(1+cos A))+sqrt((1+cos A)/(1-cos A))=2cosec A

tan(A/2)=(sqrt((1-cos A)/(1+cos A)))

sqrt ((1-cos A) / (1 + cos A)) = (sin A) / (1 + cos A)

cos(A/2)=+-sqrt((1+cos A)/(2))

(1)/(1-cos A)+(1)/(1+cos A)=2csc^(2)

Prove each of the following identities : (i) sqrt((1+ sin theta)/(1- sin theta)) = ( sec theta + tan theta) (ii) sqrt((1- cos theta)/(1+ cos theta))= ("cosec" theta - cot theta) (iii) sqrt((1+ cos theta)/(1- cos theta))+ sqrt((1- cos theta)/(1+ cos theta)) = 2 "cosec" theta

tan ""A/2 is equal to.............. A) sqrt((1- sin A)/( 1+ sin A)) B) sqrt((1+ sin A)/(1- sin A)) C) sqrt((1 -cos A)/(1 + cos A)) D) sqrt((1 +cos A)/(1- cos A))

Prove that: sqrt ((1 + cos A) / (1-cos A)) = cos ecA + cot A

Prove that sqrt((1+costheta)/(1-costheta))+sqrt((1-cos theta)/(1+cos theta))=2 " cosec"theta.