A piece of round steel is milled to a point at one end. The angle formed by the point is the angle of taper. If the steel has a 22-mm diameter and a 60° angle of taper, find the length c of the taper. 
Definitions:
Learned Helplessness
A state where an individual experiences feelings of being powerless, stemming from a traumatic experience or ongoing inability to achieve success.
Optimistic
A mindset or attitude characterized by the expectation of positive outcomes or a general belief that good things will happen.
Julian Rotter
An American psychologist known for his work in social learning theory and the development of the concept of locus of control.
Behavioral Theorist
A researcher or theorist who focuses on how observable behavior is learned and shaped through interaction with the environment.
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