Constant std::f128::consts::FRAC_1_SQRT_2

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pub const FRAC_1_SQRT_2: f128 = 0.707106781186547524400844362104849039284835937688474036588340_f128; // 0.707106781186547524400844362104848992f128
🔬This is a nightly-only experimental API. (f128 #116909)
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1/sqrt(2)