边长DMN=73.469m,方位角αMN=115°18′12″,则ΔxMN与ΔyMN分别为()。
A.+31.401m,+66.420m B.+31.401m,66.420m C.-31.401m,+66.420m D.-66.420m,+31.401m正确答案C
边长DMN=73.469m,方位角αMN=115°18′12″,则ΔxMN与ΔyMN分别为()。
A.+31.401m,+66.420m B.+31.401m,66.420m C.-31.401m,+66.420m D.-66.420m,+31.401m正确答案C