Last Updated
：2025/12/06
正弦
Hiragana
せいげん
Noun
Japanese Meaning
三角関数の一つで、直角三角形においてある角の大きさに対する、斜辺に対するその角の向かい側の辺の比、または単位円上のy座標として定義される関数。サイン。
Easy Japanese Meaning
さんかくけいで、あるかくにたいするたてのながさをあらわすかず
Sense（1）
(trigonometry) sine
（ canonical ）
（ romanization ）
（ hiragana ）
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正弦
See correct answer
The sine, which is one of the trigonometric functions, represents the ratio of the radius of a circle to the opposite side of a right triangle.
The sine, which is one of the trigonometric functions, represents the ratio of the radius of a circle to the opposite side of a right triangle.
See correct answer
三角関数の一つである正弦は、円の半径と直角三角形の対辺の比を表します。
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