Mathematics
Senior High
高1の三角比の基礎です
なぜこの問題はcos45°で1／√2となるのですか？？
(BDは10という数字が出ております)
2枚目の写真、真ん中がcosです！！
Los s0
脂6:
BC: B7 cos
450
52.
10
zh
42°
43°
44°
45°
0.7431
0.7314
0.7193
0.7071
0.6691
0.9004
88°
89°
90°
0.6820
0.6947
0.7071
0.9325
0.9657
1.0000
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