The study of anything is a vehicle for acquiring skills.
The topics studied in trigonometry including the properties of angles and triangles, as well as the properties of functions will greatly enhance your ability to reason, even qualitatively, for problems in the real world, even if they don't involve trig. Also, the discipline learned in the study of trigonometry will assist in every other subject studies, regardless of its nature.
I personally study trigonometry because it is absolutely exhilarating for me.
geometry
geometry
algebra
Trigonometry is specificly the study of a right triangle. For example, what is the cosine? Geometry is the study on shapes.
Yes
Depending on your career, you may or may not need trigonometry. If your job does not require a lot of math, it is unlikely that you will use trigonometry very often, however, this is not a reason not to study it. The skills and discipline developed in your trigoometry class will help you no matter what career you choose.
it is part of geometry
Trigonometry involves the study of triangles and their properties.
Yes, "learn" is a verb. It refers to the process of acquiring knowledge or skills through study, experience, or teaching.
Angles were known before trigonometry. Trigonometry was the study of angles and their relationship to shapes.