Mathematics
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問2 高さと底辺を求めよ。 ① (少数第3位) 20 36.9°

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参考・概略です

図を直角三角形とし、水平方向を底辺として

 ①底辺:20・cos(36,9°)=20×0.799684…
             =15.9936…
             =15.994

 ②高さ:20・sin(36.9°)=20×0.596224…
             =11.9244…
             =11,924

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