00000nz  a2200000n  4500
001  KSH2002007213
005  20021231000000
008  020308 n azknn|abn          |a a|a    | 
150  ▼a역탄젠트[逆--]▲
450  ▼a아크 탄젠트[arctangent]▲
450  ▼wr▼i영어▼aarctangent▲
550  ▼wg▼a역삼각 함수[逆三角函數]▲
550  ▼a탄젠트[tangent]▲