Let a be the position vector of a given point (x1, y1, z1), and r the position vector of any point (x, y, z). Describe the locus of r if (a) I r - a I = 3, (b) (r-a). a = 0, (c) (r-a).r = 0.

Saptarshi Sarkar

8 Years agoGrade 12th pass