tanA=2/5
A=arctan2/5
=21.801409486351811770244866086944.°
=21°48.08456918110870621469196521662.'
=21°48'5.0741508665223728815179129971924."
≈21°48'5"
一个角的正切函数为五分之二 那么这个角的度数是多少
tanA=2/5
A=arctan2/5
=21.801409486351811770244866086944.°
=21°48.08456918110870621469196521662.'
=21°48'5.0741508665223728815179129971924."
≈21°48'5"