Steps of Construction:
1. Draw a circle of any radius 3 and center A.
2. With A as center, draw a circle of radius 3 cm. With B as center, draw a circle of radius 4cm.
3. Draw a perpendicular bisector of AB which cuts AB at M.
4. With M as center and AM as radius, draw a circle.
5. The three circles intersect at K,L and M,N.
6. Join AM and AN. Join BK and BL.
7. AM,AN,BK and BL are the required tangents.
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