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Consider the circle S: x^2 + y^2 - 4x-1=...

Consider the circle `S: x^2 + y^2 - 4x-1=0` and the line `L: y = 3x - 1`. If the line L cuts the circle at A & B. (i) Length of the chord AB equal (i) The angle subtended by the chord AB in the minor arc of S is (iii). Acute angle between the line L and the circle S is

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