若角αα的终边过点(−3,−2)(−3,−2),则( )。单项选择题选项:
A.sinatana>0sinatana>0 B.cosatana>0cosatana>0 C.sinacosa>0sinacosa>0 D.sinacota>0sinacota>0正确答案C
若角αα的终边过点(−3,−2)(−3,−2),则( )。单项选择题选项:
A.sinatana>0sinatana>0 B.cosatana>0cosatana>0 C.sinacosa>0sinacosa>0 D.sinacota>0sinacota>0正确答案C