Possible bug with trigonometry functions

[mrwillson2u]

Most appropriate sub-area of p5.js?

• [ ] Accessibility
• [ ] Color
• [ ] Core/Environment/Rendering
• [ ] Data
• [ ] DOM
• [ ] Events
• [ ] Image
• [ ] IO
• [X] Math
• [ ] Typography
• [ ] Utilities
• [ ] WebGL
• [ ] Build process
• [ ] Unit testing
• [ ] Internationalization
• [ ] Friendly errors
• [ ] Other (specify if possible)

p5.js version

v1.9.4

Web browser and version

Chrome Version 125.0.6422.113 (Official Build) (x86_64)

Operating system

MacOS 12.6.2 (21G320)

Steps to reproduce this

I think there is something wrong with the trigonometry functions. I don't know if it's isolated to the cos() formula or more.

I first noticed an issue when trying to when trying to rotate a vector object. According to the p5 docs for p5.Vector.rotate(). After while trying to using workarounds I notice similar issues when just working with the basic trigonometry functions. See below for my examples. Maybe I'm missing something stupid simple, but I am losing my mind if thats the case!

I also tried the angleMode(DEGREES) but had the same issues.

Trying to use p5.Vector.rotate():

function setup() {
  let v1 = createVector(1, 0);
  v1.rotate(HALF_PI);
  console.log(v1.toString()); // According to the docs, I should get [0, 1, 0] but I don't
}

Outputs: p5.Vector Object : [6.123233995736766e-17, 1, 0]

Even just trying to get the cosine of radians(90):

  console.log(cos(radians(90)));

Outputs: 6.123233995736766e-17

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[mrwillson2u]

Woops, I realize it is in scientific notation and I wasn't taking in to account the exponent at the end.. Please disregard this issue!