JEE Main 2020 Mathematics question
A circle touches the y-axis at the point (0, 4) and passes through the point (2, 0). Which of the following lines is not a tangent to this circle?
Answer: (C)
Solution
Centre (5, 4), radius 5. Distances from the centre: (A) 25/5 = 5, (B) 25/5 = 5, (C) 24/5 ≠ 5, (D) 25/5 = 5, so only 4x + 3y
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