Question

The locus of a point such that the tangents drawn from it to the circle x² + y² – 6x – 8y = 0 are perpendicular to each other is

a. x² + y² – 6x – 8y – 25 = 0

b. x² + y² + 6x – 8y – 5 = 0

c. x² + y² – 6x + 8y – 5 = 0

d. x² + y² – 6x – 8y + 25 = 0

Answer 1

a. x² + y² – 6x – 8y – 25 = 0