If "cot"theta(1+"sin"theta)=4mand"cot"th...

If `"cot"theta(1+"sin"theta)=4mand"cot"theta(1-"sin"theta)=4n`, then which one of the following is correct ?

A

`(m^(2)+n^(2))^(2)=mn`

B

`(m^(2)-n^(2))^(2)=mn`

C

`(m^(2)-n^(2))^(2)=m^(2)n^(2)`

D

`(m^(2)+n^(2))^(2)=m^(2)n^(2)`

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