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If sqrt((1-cosθ)/(1+cosθ)) xx sqrt((cos...

If `sqrt((1-cosθ)/(1+cosθ)) xx sqrt((cosecθ -cot θ)/(cosecθ +cot θ))= (1-r)/(1+r)`, then the value of r is: यदि sqrt((1-cosθ)/(1+cosθ)) xx sqrt((cosecθ -cot θ)/(cosecθ +cot θ))= (1-r)/(1+r)` है तो r का मानहैः

A

`sinθ`

B

`cosecθ`

C

`secθ`

D

`cosθ`

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