Question

The values of k of which origin is contained in the obtuse angle.of lines 3x-2y+5=0 and kx+6y-3=0 ?

Answer 1

let,
a1=3 , b1=-2 , c1=5
a2=K , b2=6 , c2=-3

here,a1/a2≠b1/b2
3/K≠-2/6
3/K≠-1/3
-K≠9
k≠-9