Question

Angle between the tangents drawn to y² = 4x at the points where it is intersected by the line y = x –1 is

• A. $\pi/6$
• B. $\pi/3$
• C. $\pi/4$
• D. $\pi/2$

Answer 1

Answer: (D)

$\pi/2$

Answer 2

y = x – 1 is a focal chord of the parabola

y² = 4x therefore tangent at its extremities are perpendicular