Question
Question: P is a variable point on the curve y = f (x) and A is a fixed point in the plane not lying on the cu...
P is a variable point on the curve y = f (x) and A is a fixed point in the plane not lying on the curve. If PA2 is minimum, then the angle between PA and the tangent at P is-
A
4π
B
3π
C
2π
D
None of these
Answer
2π
Explanation
Solution
Obviously, AP is perpendicular on the tangent drawn to the curve.