I guess the exact value doesn't matter here, so we could just compare the result and allow a certain delta? What would be a useful delta here? static assert(sin(6.8) == 0x1.f9f8d9aea10fdf1cp-2); ---- runnable/builtin.d:15: Error: static assert (4.94113351138608159e-1L == 4.94113351138608325e-1L) is false ----
https://github.com/D-Programming-Language/dmd/pull/1148