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cos^(- 1)((x^2-y^2)/(x^2+y^2))=loga find...

`cos^(- 1)((x^2-y^2)/(x^2+y^2))=loga` find `dy/dx`

A

`y//x`

B

`x//y`

C

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

D

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

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The correct Answer is:
A
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