cosineとは 意味・読み方・使い方

語源

From co- +‎ sine, short for complementi sinus in Latin, meaning “sine of the complement”. Doublet of cosinus.

発音

• (英国発音) IPA: /ˈkəʊ.saɪn/
• (米国発音) IPA: /ˈkoʊ.saɪn/
• (General Australian) IPA: /ˈkəʉ.sɑɪn/
• 韻: -əʊsaɪn, -oʊsaɪn
• Homophone: cosign

名詞

cosine (plural cosines)

1. (trigonometry) In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos

使用する際の注意点

In various branches of mathematics, the cosine of an angle is determined in various ways, including the following:

• The x-coordinate of the point on the unit circle at the given anticlockwise angle from the x-axis.
• The sum of the real or complex power series
  
        ${\displaystyle \sum _{n=0}^{\infty }{\frac {(-1)^{n}x^{2n}}{(2n)!}}=1-{x^{2} \over 2}+{x^{4} \over 24}-{x^{6} \over 720}+{x^{8} \over 40320}-\cdots }$
  
  where x is in radians.

派生語

関連する語

• arccosine
• sine

参考

アナグラム

• Enciso, Inscoe, Senoic, coines, conies, oscine