sec[arcsin(2499/2501)],怎么解答
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
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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