tan多少度等于0.361
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约等于19.5°
tan(0°)=0tan(1°)=0.01746tan(2°)=0.03492tan(3°)=0.05241tan(4°)=0.06993tan(5°)=0.08749tan(6°)=0.1051tan(7°)=0.12278tan(8°)=0.14054tan(9°)=0.15838tan(10°)=0.17633tan(11°)=0.19438tan(12°)=0.21256tan(13°)=0.23087tan(14°)=0.24933tan(15°)=0.26795tan(16°)=0.28675tan(17°)=0.30573tan(18°)=0.32492tan(19°)=0.34433tan(20°)=0.36397tan(21°)=0.38386tan(22°)=0.40403tan(23°)=0.42447。
在Rt△ABC（直角三角形）中，∠C=90°，AB是∠C的对边c，BC是∠A的对边a，AC是∠B的对边b，正切函数就是tanB=b/a，即tanB=AC/BC。
tan(0°)=0tan(1°)=0.01746tan(2°)=0.03492tan(3°)=0.05241tan(4°)=0.06993tan(5°)=0.08749tan(6°)=0.1051tan(7°)=0.12278tan(8°)=0.14054tan(9°)=0.15838tan(10°)=0.17633tan(11°)=0.19438tan(12°)=0.21256tan(13°)=0.23087tan(14°)=0.24933tan(15°)=0.26795tan(16°)=0.28675tan(17°)=0.30573tan(18°)=0.32492tan(19°)=0.34433tan(20°)=0.36397tan(21°)=0.38386tan(22°)=0.40403tan(23°)=0.42447。
在Rt△ABC（直角三角形）中，∠C=90°，AB是∠C的对边c，BC是∠A的对边a，AC是∠B的对边b，正切函数就是tanB=b/a，即tanB=AC/BC。
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