I am from Europe (Sweden) an I learned it the way described in the article, so when I read it I had to read it twice to try to figure out what I was missing. B

I am from Europe (Sweden) an I learned it the way described in the article, so when I read it I had to read it twice to try to figure out what I was missing. But I had a very inspiring (or stubborn ymmv) maths teacher. He insisted that we learned sine cosine by drawing our own unit circle and measure from with a ruler. Calculators were forbidden.