They need to study how stresses and other forces will act in structures and trigonometry is essential for studying these.
almost all kind of engineer
Yes.
The answer will depend on what exactly x represents. With no information about that, the question is pointless.
this type of engineer uses nuclear physics math
how can trigonometry use in metallurgy
Use trigonometry depending on what type of triangle it is.
One example of an astronomer's use of trigonometry is determining the distance to a star by triangulation.
That depends on your profession. If you are a math teacher, then you might use a lot of Trig. If you are an engineer, working with forces on any object from different directions, then you would use trig. Electrical engineers use trig. Surveyors use trig.
Mechanics use trigonometry to find angles mostly used in body or chassis work.
Well, if Edward Cullen the bloodsucking vampire can use trigonometry. Then I am asuming farmers can as well.
An Engineer (:
The first recorded use of trigonometry came from the Hellenistic mathematician Hipparchus