正切对数表(角度)
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log(tan(2.1°)) = -1.43570880500799
log(tan(2.2°)) = -1.41548644435344
log(tan(2.3°)) = -1.39616143081108
log(tan(2.4°)) = -1.37765728281974
log(tan(2.5°)) = -1.35990688943444
log(tan(2.6°)) = -1.34285103939848
log(tan(2.7°)) = -1.32643722796845
log(tan(2.8°)) = -1.31061868083874
log(tan(2.9°)) = -1.29535354942336
log(tan(3.0°)) = -1.2806042426167
特别标注45°附近的对数特性，提供角度互补关系速查（如log(tanθ)与log(tan(90°-θ))的关系），支持导出航海专用对数表格式。