On the job, that is. But I'll be the first to admit that was just a fluke. Most of the time, at work, I just shuffled paper and looked things up. In 2005 I published a paper for a professional conference that had some trig in it, about how to calculate the height of objects from their shadows on aerial photographs. Previous to that, I used a lot of trig in a Fortran program I wrote back in the late 1980s that was involved in image perspective transformations, how objects in an image will be distorted and displaced as the camera position and orientation changes.

I've used trig in my hobby of navigation more recently but that was strictly for recreation.

But without trigonometry, you can't do calculus. And without calculus, you can't do modern engineering and science. Without calculus our technology would still be stuck in the 17th century. There would be no coding because there would be no computers, and computers would not exist because there would be no electronics, because electronics comes from Maxwell's equations and that is all about differential equations and vector calculus.

Coding, programming, data processing, information technology, whatever you want to call it, is not science, its not even engineering, it barely deserves to be called technology. Its home electrician stuff, shade tree mechanic stuff. An illiterate can learn to overhaul an internal combustion engine, but he can't design one from scratch because he doesn't understand the physical processes involved in its operation, or their mathematical description and optimization, except perhaps at the most purely simplistic and elementary level.

Don't get me wrong, I have a great deal of respect for anyone who can overhaul an internal combustion engine. I know I wouldn't know where to even start. And I haven't a clue as to how to do even the most routine house wiring task; I'd probably burn the place down if I tried. But that's not science, and its not engineering. I'm a good sailor but I'm no naval architect. But I do know enough about both to tell the difference.

Come to think of it, I've never used any of my calculus or differential equations except at school. But I've never been employed as a real scientist or engineer, either. I was a programmer, and that is just technician work, regardless of my fancy job titles.