Comment on Speeding up atan2fparentComments−RicoElectrico5yCome on, at this point I've seen this "engineering approximation" memed so many times, even on Instagram ;)What is more interesting to me is that this can be one of rationales behind using radians.And that tan(x)~x also holds for small angles, greatly easing estimations of distance to objects of known size (cf. mil-dot reticle).−lapetitejort5ytan(x)~x because cos(x)~1. It's approximations all the way down.
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Come on, at this point I've seen this "engineering approximation" memed so many times, even on Instagram ;)
What is more interesting to me is that this can be one of rationales behind using radians.
And that tan(x)~x also holds for small angles, greatly easing estimations of distance to objects of known size (cf. mil-dot reticle).
tan(x)~x because cos(x)~1. It's approximations all the way down.