What is tan of 60 degrees?

The tan of 60 degrees is √3. Trigonometry is the study of triangles. An angle is the amount of rotation of a revolving line relative to a fixed-line. An angle is positive if the rotation is counterclockwise and negative if the rotation is clockwise. Angles are measured using either the Sexagesimal or Circular systems.
Consider a sexagesimal system unit circle where the degree is indicated by the sign’ 1 degree’. One degree is split into 10 hours (60′), and each minute is subdivided into 60 seconds (60″).