—It's very kind of you to carry the box for me.
— __________.
A:I'd love to
B:Thank you for saying so
C:It is my pleasure
D:It's my work.
已知角α的顶点与原点重合,始边与x轴的正半轴重合,终边经过点P(﹣3,m),且sinα=﹣45,则tanα等于( )