[farresito]

I would hope most people do. It's in pretty much every high school curriculum, isn't it?

[maleldil]

https://xkcd.com/2501/

Even if most people had calculus in high school (which is not a given), I'd expect pretty much anyone who did not go into STEM to promptly forget it, just like I forgot much from chemistry and biology after studying Computer Science.

[legobmw99]

I attended one of the better (read: top ~200) public high schools in the US, and you could graduate without even taking trigonometry

[breezybottom]

Not in the United States at least. It's only something you would need if you went on to college anyway.