计算：sec[arcsin(609/641)]的值
求(609/641)的反正弦，再求正割值
![计算：sec[arcsin(609/641)]的值](/d/file/education/2022-02-03/i1217ci53797.jpg)
![计算：sec[arcsin(609/641)]的值](/d/file/education/2022-02-03/idf717i86544.jpg)
arcsin(609/641)≈71.819°
sec［arcsin(609/641)］
≈sec71.819°
＝1/cos71.819°
≈3.205
sec［arcsin(609/641)］
＝1/cos［arcsin(609/641)］
≈3.205
热门标签：
求(609/641)的反正弦，再求正割值
arcsin(609/641)≈71.819°
sec［arcsin(609/641)］
≈sec71.819°
＝1/cos71.819°
≈3.205
sec［arcsin(609/641)］
＝1/cos［arcsin(609/641)］
≈3.205