• 2022-05-28
    已知角,求 sinα=_______(A.0 B.1 C.-1 D.无意义) cosα=_______(A.0 B.1 C.-1 D.无意义) tanα=_______(A.0 B.1 C.-1 D.无意义) cotα=_______(A.0 B.1 C.-1 D.无意义)/ananas/latex/p/965196