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Rollup merge of #47919 - varkor:to_degrees-precision, r=rkruppe Use constant for 180/π in to_degrees The current f32|f64.to_degrees implementation uses a division to calculate 180/π, which causes a loss of precision. Using a constant is still not perfect (implementing a maximally-precise algorithm would come with a high performance cost), but improves precision with a minimal change. As per the discussion in #29944, this fixes#29944 (the costs of improving the precision further would not outweigh the gains).
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