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acosd returns a complex number

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Diana Dawoud
Diana Dawoud il 13 Nov 2020
Modificato: Stephen23 il 13 Nov 2020
I'm trying to find acosd(15/9) in matalb but i'm getting 0.0000 +62.9458i, what dose that mean?
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Stephen23
Stephen23 il 13 Nov 2020
Modificato: Stephen23 il 13 Nov 2020
Ran in:
"I'm trying to find acosd(15/9) in matalb but i'm getting 0.0000 +62.9458i, what dose that mean?"
15/9
ans = 1.6667
What do you expect the arccosine to be for this value? Or, for that matter, for any value >1 ?
https://en.wikipedia.org/wiki/Inverse_trigonometric_functions

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