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If cot theta = (2xy)/(x^(2) - y^(2)), th...

If `cot theta = (2xy)/(x^(2) - y^(2))`, then what is `cos theta` equal to ?

A

`(x^(2) - y^(2))/(x^(2) + y^(2))`

B

`(x^(2) + y^(2))/(x^(2) - y^(2))`

C

`(2xy)/(x^(2) + y^(2))`

D

`(2xy)/(sqrt(x^(2) + y^(2)))`

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