- 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)
this post was submitted on 25 May 2024
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Daily Maths Challenges
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Share your cool maths problems.
Complete a challenge:
- Post your solution in comments, if it is exactly the same as OP's solution, let us know.
- Have fun.
Post a challenge:
- Doesn't have to be original, as long as it is not a duplicate.
- Challenges not riddles, if the post is longer than 3 paragraphs, reconsider yourself.
- Optionally include solution in comments, let it be clear this is not a homework help forums.
- Tag [unsolved] if you don't have a solution yet.
- Please include images, if your question includes complex symbols, attach a render of the maths.
Feel free to contribute to a series by DMing the OP, or start your own challenge series.
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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
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.