若0<x<π/2,则arccos[cos﹙π/2+x﹚]+arcsin[sin﹙π+x﹚]等于﹙ ﹚A.π/2 B.﹣π/2 C.π/2-2x

问题描述:

若0<x<π/2,则arccos[cos﹙π/2+x﹚]+arcsin[sin﹙π+x﹚]等于﹙ ﹚A.π/2 B.﹣π/2 C.π/2-2x
D.﹣π/2-2

B