试题详情
单项选择题COS(X-Y)=()

A、COSXCOSY-SINXSINY

B、COSXCOSY+SINXSINY

C、COSXSINX-SINYCOSY

D、COSXSINX+SINYCOSY

  • B
  • 关注下方微信公众号,在线模考后查看

热门试题