题目内容
曲线y=x3-4x在点(1,-3)处的切线倾斜角为________;
曲线y=x3-4x在点(1,-3)处的切线倾斜角为
A.
B.
C.
D.
曲线y=x3-4x在点(1,-3)处的切线的倾斜角为________.
曲线y=x3-4x在点(1,-3)处的切线倾斜角为_________.