200分求一道数学题,懂英文的来拉,图片应该会一会儿会上去Two points P and Q on level ground are on opposite sides of a building.To find the distance between the points,a surveyor chooses a point R that is a = 328 feet from P and c
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![200分求一道数学题,懂英文的来拉,图片应该会一会儿会上去Two points P and Q on level ground are on opposite sides of a building.To find the distance between the points,a surveyor chooses a point R that is a = 328 feet from P and c](/uploads/image/z/5338394-26-4.jpg?t=200%E5%88%86%E6%B1%82%E4%B8%80%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E6%87%82%E8%8B%B1%E6%96%87%E7%9A%84%E6%9D%A5%E6%8B%89%2C%E5%9B%BE%E7%89%87%E5%BA%94%E8%AF%A5%E4%BC%9A%E4%B8%80%E4%BC%9A%E5%84%BF%E4%BC%9A%E4%B8%8A%E5%8E%BBTwo+points+P+and+Q+on+level+ground+are+on+opposite+sides+of+a+building.To+find+the+distance+between+the+points%2Ca+surveyor+chooses+a+point+R+that+is+a+%3D+328+feet+from+P+and+c)
200分求一道数学题,懂英文的来拉,图片应该会一会儿会上去Two points P and Q on level ground are on opposite sides of a building.To find the distance between the points,a surveyor chooses a point R that is a = 328 feet from P and c
200分求一道数学题,懂英文的来拉,图片应该会一会儿会上去
Two points P and Q on level ground are on opposite sides of a building.To find the distance between the points,a surveyor chooses a point R that is a = 328 feet from P and c = 446 feet from Q and then determines that angle PRQ has measure α = 35°50' (see the figure).Approximate the distance between P and Q.(Round your answer to the nearest whole number.)
200分求一道数学题,懂英文的来拉,图片应该会一会儿会上去Two points P and Q on level ground are on opposite sides of a building.To find the distance between the points,a surveyor chooses a point R that is a = 328 feet from P and c
PQ^2=c^2 +a^2 - 2·a·c·cosα=328^2+446^2-2*328*446*cos35°50'=68309.3381
so PQ=261.36 feet