Construct an angle of `15^(@)` using ruler and compasses only.

Explanation

STEPS OF CONSTRUCTION
(i) Construct `angleAOB=60^(@)`, as indicated in Example 3.
(ii) Draw the bisector `OC` of `angleAOB`, as indicated in Example 2.
(iii) Draw the bisector `OD` of `angleAOC`, as indicated in Example 2.
then, `angleAOD=15^(@)` is the require angle.