Mathematics
Senior High
Resolved
11番教えてください
(1) sin 10°cos80° - sin 100°
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Sinkisintotsinoco500
sin²10°+cos²10
11 右の図において, PQ の長さを求めよ。
ただし, 答えは分母を有理化すること。
130°
2 B
45°
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