Thoughts
Happening upon trigonometry at a young age, before it is taught, while special, is not impressive.
I asked my 6th grade math teacher for a function that would take a slope and return the number of degrees you would need to rotate a line in order to end up with that slope. (I needed it for a programming project.) She was unable to answer me. I remember looking at a staircase in my middle school, and thinking, this goes up at a slope of 1, and a 45ยบ angle. What's the relationship between those numbers?
It's like, congrats, you've stumbled upon one of the most important fields in math. It's impressive that I was wandering from the curriculum, but stumbling onto trig is relatively unsurprising.