第六題
A(175263.034,2507634.239)
B(175366.607,2507801.797)
175366.607-175263.034=103.573
2507801.797-2507634.239=167.558
103.573x103.573+167.558x167.558=196.98489711904311371096825021564
-1
Sin (103.573/196.98489711904311371096825021564)=31.72154723度
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