almost all kind of engineer
The main kinds are plane trigonometry and solid trigonometry. The latter will include trigonometry in hyper-spaces.
Trigonometry is the study of plane and spherical triangles. Plane trigonometry deals with 2 Dimensional triangles like the ones you would draw on a piece of paper. But, spherical trigonometry deals with circles and 3 Dimensional triangles. Plane trigonometry uses different numbers and equations than spherical trigonometry. There's plane trigonometry, where you work with triangles on a flat surface, then there's spherical trigonometry, where you work with triangles on a sphere.
With a protractor or use trigonometry if you know its dimensions
how can trigonometry use in metallurgy
One example of an astronomer's use of trigonometry is determining the distance to a star by triangulation.
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.
yes they do
The first recorded use of trigonometry came from the Hellenistic mathematician Hipparchus
An architect who designs a bridge would use trigonometry, among other mathematical techniques.
None. You do not need any knowedge of astronomy to study and be an expert at trigonometry.
For navigational purposes