Solution:
Steps to construct:
Step 1: Mark a point O.
Step 2: With center O and radius 4cm and 6cm, draw two concentric circles.
Step 3: Join OA and mark its mid-point as M.
Step 4: With center M and radius MA, draw another circle which intersects the first circle at P and Q.
Step 5: Join AP and AQ. Hence, AP and AQ are the required tangents to the first circle from point A.