题目
如右图所示，已知AB边的方位角为130°20′，BC边的长度为82m，∠ABC = 120°10′，XB=460m, YB=320m，计算分别计算BC边的方位角和C点的坐标。a-|||-A-|||-下曰-|||-b-|||-钢-|||-四-|||-尺-|||-a1-|||-A-|||-15千克-|||-重锤-|||-阳阳 开始相同________________________________________________________________________________________________________________________________________________________________________________
如右图所示，已知AB边的方位角为130°20′，BC边的长度为82m，∠ABC = 120°10′，XB=460m, YB=320m，计算分别计算BC边的方位角和C点的坐标。
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题目解答
答案
BC 边的方位角为α BC = 130 ° 20 ′ +180 ° + 120 ° 10 ′ = 70 ° 30 ′ XC = XB + DBC * cos α BC = 487.4m YC = YB + DBC * sin α BC = 397.3m