来自景兴建的问题
函数y＝sinxcosx的导数为（）A．cos2x−sin2xcos2xB．−cos2x+sin2xcos2xC．cos2x+sin2xcos2xD．−cos2x−sin2xcos2x
函数y＝sinxcosx的导数为（）
A．cos2x−sin2xcos2x
B．−cos2x+sin2xcos2x
C．cos2x+sin2xcos2x
D．−cos2x−sin2xcos2x
1回答
2020-12-27 01:21