Mathematics
Senior High
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早めに！！
座標平面上の2点P (2 cos 0, 2sin 0),Q(2cos0+cos70, 2sin0+ sin 70 を考える.
PQ:
イであり,
OP
=
0Q²
-
ア
3
ウ +
ウ +
=
I (cos 70 cos 0 + sin 70 sin 0)
オ
I COS
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