Constant tracing::stdlib::f16::consts::FRAC_1_SQRT_2

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pub const FRAC_1_SQRT_2: f16 = 0.707106781186547524400844362104849039_f16; // 0.70703f16
🔬This is a nightly-only experimental API. (f16 #116909)
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1/sqrt(2)