Especially looking at sine and cosine here. I'm trying to learn them by heart and it's quite unintuitive for me. If you guys could tell me about your way, be it by drawing up something or a table, I'd be glad to hear you guys suggestions :))
The values for sine of 0, 30, 45, 60, and 90 degrees (of course in "real" maths we don't use degrees, but this is how I learnt it when I first encountered trigonometric functions) are $\frac12\sqrt0$, $\frac12\sqrt1$, $\frac12\sqrt2$, $\frac12\sqrt3$, $\frac12\sqrt4$. For cosine you go in the opposite direction.