COS(X+Y)=()
2023-12-012018年技能专家考核评价题库-计量运维
COS(X+Y)=()
A.COSXCOSY-SINXSINY
B.COSXCOSY+SINXSINY
C.COSXSINX-SINYCOSY
D.COSXSINX+SINYCOSY
正确答案是A

COS(X+Y)=()
A.COSXCOSY-SINXSINY
B.COSXCOSY+SINXSINY
C.COSXSINX-SINYCOSY
D.COSXSINX+SINYCOSY
正确答案是A