Why when I tried to take a cos of 90 degrees I get some weird value other than zero? Math.Cos(90 * Math.PI / 180)
PS: I'm aware that Math.Cos function take radians instead of an angle.
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Ivandro Jao
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2and what is this "weird value" you're seeing? – Stealth Rabbi Feb 03 '17 at 15:22
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3What is "some weird value"? Can you provide what you DO get vs what you are expecting? – Theo Feb 03 '17 at 15:22
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16.1230317691118863E-17 @StealthRabbi | Theo – Ivandro Jao Feb 03 '17 at 15:23
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3That's very *close* to zero. – Damien_The_Unbeliever Feb 03 '17 at 15:25
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2`6.1230317691118863E-17` is `6.12 * 10^-17` so actually `0.0000000000000000612` (I may be off by one 0) which is pretty much `0`. The reason it's not exactly `0` is the representation of floating point values. It's a kind of rounding issue. – René Vogt Feb 03 '17 at 15:28
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1It may be a difference of running in Debug vs Release mode, as, I believe, Debug gives you higher floating point precision. – Stealth Rabbi Feb 03 '17 at 15:29
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1The value seems to be close to `0.000000000000000061230317691118863`, which is 'near zero'. – Codor Feb 03 '17 at 15:32
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1Thank you all :), I was being tricked by Scientific-notation. – Ivandro Jao Feb 03 '17 at 15:33
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That is also an issue with Radians..... since 90 * math.pi/180 doesn't ever return pi/2 since math.pi is already truncated..... – Trevor_G Feb 03 '17 at 17:43