A:Such construction robots are clever
B:So clever the construction robots are
C:Such clever construction robots are
D:So clever are the construction robot
____×____=____
在直角坐标系中,P是第一象限内的点,OP与x轴正半轴的夹角α的正切值是 43 ,则cosα的值是( )
A. B. C.
D. E. F.
G. H.