# A tangent is drawn from an external point O to a circle of radius 3 units at P such that OP = 4

A tangent is drawn from an external point O to a circle of radius 3 units at P such that OP = 4 units. If C is the centre of the circle , then the sine of the angle COP is

(a) 4/5

(b) 1/3

(c) 3/5

(d) ½