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The co-ordinates of the incentre of the ...

The co-ordinates of the incentre of the triangle having sides `3x - 4y = 0, 5x + 12y =0` and `y-15=0` are:

A

`(1,8 )`

B

`( - 1,8)`

C

`(1,-8)`

D

`(1, 4)`

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