1. the locus of point (l,m). if the line lx+my=1 touches the circle x^2+y^2=a^2

a – x^2+y^2=2a^2

b – 2x^2+2y^2 = a^2

c – a^2(x^2+y^2) = 1

d – a^2(x^2+y^2) = 2

​2. locus of point of intersection of tangents to the circle x^2+y^2+2x+4y-1 = 0

a – x^2+y^2+2x+4y-19 = 0 b – x^2+y^2-2x-4y-19 = 0

c – x^2+y^2+2x+4y+19 = 0

d – x^2+y^2-2x-4y+19 = 0

3. locus of point of intersection of perpendicular tangents to the circle x^2+y^2 = 10

a – x^2+y^2 = 5

b – x^2+y^2 = 20

c – x^2+y^2 = 10

d – x^2+y^2 = 100

RAJEEV R

10 Years agoGrade 9