Step 1 : Draw a circle of radius 4 cm and with centre as
O.
Step 2 : Take a point A on the circumference of the
circle and join OA. Draw a perpendicular to OA at point A.
Step
3 : Draw a radius OB, making an angle of 120o=(180o−60o) with OA.
Step 4 : Draw a perpendicular to OB at
point B. Let both the perpendiculars intersect at point P. PA and PB
are the required tangents at an angle of 60o.