# azimuth

drillable.com › aa-usno-navy-mil › easter › azimuth.
As of the index built 10 Sep 2026, 00:38 UTC · [cites, never asserts](/standing).
Source: The Date of Easter, by https://aa.usno.navy.mil.
MCP https://mcp.drillable.com · [html](/e/aa-usno-navy-mil/easter/azimuth.html) · [markdown](/e/aa-usno-navy-mil/easter/azimuth.md) · [json](/e/aa-usno-navy-mil/easter/azimuth.json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Records (4)

By drillable.com ([llm-extract/1](/standing#methods)); scored precision 1.00, recall 0.34 on the harness's last sample of 35.

- **computation-method** = double-argument arctangent function (such as atan2 in Fortran or C) should be used with the numerator and denominator entered separately · [quote](/r/sha256:5fb2f96353c2ac943f32662a18c2e14eee59e94595ae8c0304230300c4b28af9?trace&start=4542&end=4740) · [sha256:0bd283ca8e21d035…](/r/sha256:0bd283ca8e21d03531f8d24f5fe19c199d763174207bf54ae8d7a6912cb46be1)
- **definition** = the angular distance measured clockwise along the observer's horizon from a specified reference point (usually true north) to the intersection with a great circle drawn from the observer's zenith through the celestial body of interest · [quote](/r/sha256:5fb2f96353c2ac943f32662a18c2e14eee59e94595ae8c0304230300c4b28af9?trace&start=2757&end=3003) · [sha256:58eb9149face2693…](/r/sha256:58eb9149face2693eb820860fc1ec52f1c46d67b9345eee5bb406dfc04bd25af)
- **formula** = tan A = -sin(LHA) / [tan(δ) cos(φ) - sin(φ) cos(LHA)] · [quote](/r/sha256:faa3c78d7fc2a86ac04d899a1c932438629bd82c6afa717b1bbcd04513302cdb?trace&start=4610&end=4666) · [sha256:7400256e47d38e70…](/r/sha256:7400256e47d38e705ea244da255674de78c9d035d050ab594f88cd737efcaaa8)
- **formula** = tan A = -sin(LHA) / [tan(δ) cos(φ) - sin(φ) cos(LHA)] [superseded] · [quote](/r/sha256:5fb2f96353c2ac943f32662a18c2e14eee59e94595ae8c0304230300c4b28af9?trace&start=4428&end=4484) · [sha256:d5bd6fd10659ec16…](/r/sha256:d5bd6fd10659ec16221061e15f01f76293de86ba099256be3b07b1cb7f722606)

Everything here is a record by a named reader, arranged; where readers disagree, both are shown.
No reader has asserted a label for it; the title is its address.

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