✨ Best Answer ✨
ACが400m
BCがxm
なので
x/400=tan39°
↓
x=400tan39°
(三角比の表を見るとtan39°=0.8098)
↓
x=400×0.8098
=323.92
よって、答えは324m
✨ Best Answer ✨
ACが400m
BCがxm
なので
x/400=tan39°
↓
x=400tan39°
(三角比の表を見るとtan39°=0.8098)
↓
x=400×0.8098
=323.92
よって、答えは324m
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cosでもtanでも良いです