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If the pair of tangents are drawn from t...

If the pair of tangents are drawn from the point (4,5) to the circle `x^(2)+y^(2)-4x-2y-11=0`, then
(i) Find the length of chord of contact.
(ii) Find the area of the triangle fromed by a pair of tangents and their chord of contact.
(iii) Find the angle between the pair of tangents.

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