Rough figure is given below.
Since tangent is perpendicular to radius, OP line l .
Also OQ line m.
The perpendicular line segments to OP and OQ at point P and Q will give the required tangents at P and Q.
Given radius = 3.3 cm.
Diameter = 3.3 ×2 = 6.6cm.
So chord PQ is the diameter of the circle.
The tangents are parallel to each other.