sec[arcsin(1508/1517)]
求(1508/1517)的反正弦，然后求正割值
![sec[arcsin(1508/1517)]](/d/file/computer/2021-10-12/i4588ei85405.jpg)
![sec[arcsin(1508/1517)]](/d/file/computer/2021-10-12/i4b843i43093.jpg)
![sec[arcsin(1508/1517)]](/d/file/computer/2021-10-12/i285e8i37615.jpg)
arcsin(1508/1517)≈83°45′21″
sec83°45′21″＝1/cos83°45′21″≈1/0.1087656685≈9.1940776331≈9.194
所以：sec[arcsin(1508/1517)]＝sec83°45′21″≈9.194
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求(1508/1517)的反正弦，然后求正割值
arcsin(1508/1517)≈83°45′21″
sec83°45′21″＝1/cos83°45′21″≈1/0.1087656685≈9.1940776331≈9.194
所以：sec[arcsin(1508/1517)]＝sec83°45′21″≈9.194