I didn't know these mnemonic technics. I find them nice. I put them here. > "Je donne également des mnémos pour retenir. Par exemple pour cos(a+b), penser à CO CO Si Si."
> https://twitter.com/QuangThaiNgo1 > We can find them here too: > "Procédé mnémotechnique : retenir « coco-moins-sisi-sico-cosi » pour l'ordre des fonctions. > Les produits cos(a)cos(b), sin(a)sin(b) et sin(a)cos(b) s'obtiennent à partir des formules d'addition." > http://www.trigofacile.com/maths/trigo/etude/formulaires/essentiel-circulaire.htm It works with hyperbolic trigonometry too. Have all the trigonometric relationships been entered in metamath. A keyword like "trigonometric relationships" could help to retrieve them easily. We can also group them together. -- FL -- You received this message because you are subscribed to the Google Groups "Metamath" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/metamath/3de20a8d-7ed3-4f47-9227-a40404c7646a%40googlegroups.com.
