sec[arcsin(2499/2501)]，怎么解答

更新时间2022-02-02 00:52:31

sec[asin(2499/2501)]=

sina=2499/2501

cosa=±√[1-(2499/2501)²]

=±√[1-(6245001/6255001)]

=±√[(62550011-6245001)/6255001]

=±√[10000/6255001]

=±100/2501

seca=±2501/100