You need to look at the diagram and the different numbers that are given to come up with the solution. A lot of people do not think that trigonometry is going to be important in their lives, but actually, this is something that can be useful for people who plan on building careers that involve calculating angles and triangles.
This is a skill that people can learn when they study trigonometry. Basic trigonometry can be acquired at an early age, but the more advanced versions can become available in the long run. Without proper knowledge, some people may fail at doing their tasks.