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In each paragraph 2 multiple choice questions have to be answered. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
Let PQ be a focal chord of the parabola y2=4ax. The tangents to the parabola at P and Q meet at a point lying on the line y = 2x + a, a > 0.
If chord PQ subtends an angle θ at the vertex of y2=4ax, then tanθ=