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If the line 3x – 2y + 12 = 0 intersects the parabola 4y = 3x 2 at the points A and B, then at the vertex of the parabola, the line segment AB subtends an angle equal to-

1. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 9 11 tan 1
2. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − π − 2 3 tan 2 1
3. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 5 4 tan 1
4. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 7 9 tan 1

Correct answer: ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 7 9 tan 1

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