这题怎么解
郭敦顒回答:
A点坐标为A(532.87,432.87),B点坐标为B(600.28,361.04),坐标值的单位:m。
作AE⊥BE于E,且E点坐标为E(532.87,361.04),
AB=[(532.87-600.28)²+(432.87-36104)²]=
tan∠ABE=AE/BE=(432.87-361.04)/|532.87-600.28|=1.06557,
∠ABE=46.8182°,
∠ABC=95°26′档颤36″=95.4433°,
作CF⊥EB的延长线于F,
则∠CBF=180°-46.8182°-95.4433°=37.7385°,
BF=BC cos∠CBF =150.112cos37.7385°=118.71(m),
CF= BC sin∠CBF =150.112sin37.7385°=91.877(m)。
600.28+118.71=718.99(m),
361.04+91.877=452.92(m)迟渣
C点坐标为C(718.99,452.92)。
cos∠BCF=CF/BC=91.877/150.112=0.61206,
∠BCF=52.2614°,
作DG⊥行旦败CF于G,β2=235°40′20″=235.6722°,
则∠DCG=360°-235.6722°-52.2614°=72.0664°,
DG=CDsin∠DCG=241.365sin72.0664°=229.638(m),
CG= CD cos∠DCG=241.365 cos72.0664°=74.32(m),
718.99+229.638=948.63(m),
452.92-74.32=378.60(m),
D点坐标为D(948.63,378.60)。