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the issue with imaginary numbers in equations answers
  Rank: Member Groups: Registered
Joined: 08/11/2019(UTC)
Posts: 11
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Some of my answers include "і" signs, what should I do to get a regular answer? At first, I thought it was a problem in the cosine equations but later saw the same problem in other formulas.  TROPtaKhV_Lb2.sm (357kb) downloaded 11 time(s). 
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  Rank: Advanced Member Groups: Registered
Joined: 23/12/2011(UTC) Posts: 325   Location: italy Was thanked: 115 time(s) in 98 post(s)
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"i" indicates that this is a complex number with an imaginary part.
It is completely normal for the cases you have exposed since the square root of a negative number does not make sense in the real field (it is a complex number); in the same way, the arc-cosine makes sense in the real field only for numbers less than or equal to 1
sergio
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 1 user thanked PompelmoTell for this useful post.
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 Rank: Guest
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Joined: 04/07/2015(UTC) Posts: 6,866  Was thanked: 983 time(s) in 811 post(s)
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literal 'l' is too confusing, use λ [Greek] imaginary 'i' and ordinary 'i' are not compatible especially in for loop... please check. TROPtaKhV_Lb2 Test back.sm (357kb) downloaded 22 time(s).
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1 user thanked Jean Giraud for this useful post.
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the issue with imaginary numbers in equations answers
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