Welders/fabricators and machinists use trig to set up accurate angles. In general, if one has never seen something from middle/high school math used, one isn't

Welders/fabricators and machinists use trig to set up accurate angles. In general, if one has never seen something from middle/high school math used, one isn't looking very hard. See these videos for examples: Sine bar (This Old Tony): https://youtu.be/PO-Ab7YfBzY https://youtu.be/PO-Ab7YfBzY Compound slide tricks (Blondiehacks): https://youtu.be/6AQzDVic-hk https://youtu.be/6AQzDVic-hk