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If (x)/(y) = (cos A)/( cos B) then (x ta...

If `(x)/(y) = (cos A)/( cos B) then (x tan A +y tan B)/(x +y) =`

A

`tan "" (A +B)/( 2)`

B

`tan "" (A-B)/( 2)`

C

`cot ""(A+B)/(2)`

D

`cot"" (A-B)/(2)`

Text Solution

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A
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