已知边长,方位角,则和分别为:()A: +31.401m,+66.420mB: +31.401m,-66.420mC: -31.401m,+66.420mD: -66.420m,+31.401m

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已知边长,方位角,则分别为:()

  • A: +31.401m,+66.420m
  • B: +31.401m,-66.420m
  • C: -31.401m,+66.420m
  • D: -66.420m,+31.401m

请帮忙给出正确答案和分析,谢谢!