• Show that cosθ=(u⋅v)/(|u||v|) for 2D vectors u and v.

(it is quite hard to come up with these challenges, so if you got any ideas, please post them)

  • drolex
    10·
    6 months ago

    Just a note: I’m afraid I don’t have any challenge to offer (but I’ll try to find something even if it feels inadequate given the quality offered here). Just know that I’m very grateful for the posts, they are always great

    • quilan@lemmy.world
      5·
      6 months ago

      Aye, seconded; I’d like to also add in my normally-silent-upvote of these posts. They’re a really neat idea and I’m fine myself continually looking forward to each next one.