Re: why doesn't wolfram alpha plot this graph?

Op 18/11/2024 om 19:01 schreef wugi:

Op 18/11/2024 om 12:28 schreef wugi:

Op 18/11/2024 om 10:22 schreef sobriquet:

Op 18/11/2024 om 01:16 schreef wugi:

Op 16/11/2024 om 16:25 schreef sobriquet:

Op 16/11/2024 om 20:22 schreef sobriquet:

Hi!
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Recently someone shared this on discord:
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https://www.desmos.com/calculator/rddekjhbtu
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Somehow wolfram alpha seems unable to plot this?
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https://www.wolframalpha.com/input?i=plot+y%3Dsin%282x%29%2F2+tan%28%282pi%29%5E%7Csin%28x%29%2Biy%7C%29
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Uh... that wolfram link should actually be this one instead:
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https://www.wolframalpha.com/input?i=plot+y%3Dsin%282x%29%2F2+tan%28%282pi%29%5E%281-%7Csin%28x%29%2Biy%7C%29%29

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It's in the tan( ) part. Desmos plots a train of circles surmounted by a flattened sine. Wolfram refuses that one. Multifunction?
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Mod can cause issues I guess..
I can reduce the expression and still wolfram won't plot it, while desmos does.
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https://www.desmos.com/calculator/ryppmmdhsi
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https://www.wolframalpha.com/input?i=plot+y%3Dx%7Cx%2Biy%7C

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It seems it can plot graphs with
y=Abs(f(x)) but not with
y=Abs(f(x,y)).
But it does with
Re() and Im()
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... while sqrt(xx-yy) isn't a problem:
https://www.wolframalpha.com/input?i=plot+y%3Dx*sqrt%28xx-yy%29
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!!??

 [rather (...+yy)]
 And this one:
https://www.wolframalpha.com/input?i=plot+y%3Dsin%282x%29%2F2+tan%28%282pi%29%5E%281-sqrt%28%28sin%28x%29%29%5E2%2By%5E2%29
 Complex mods or abss won't do.