cosine

/ˈkəʊsaɪn/ (bre, ipa) · /ˈkəʊsaɪn/ (ame, ipa) · /ˈkō-ˌsīn/ (ame, mw)

cosine — 名詞

  • cosinesingular
  • cosinesplural

1. in trigonometry, a cosine is the number you get in a right triangle by comparing

1.名詞B2
釋義

餘弦

直角三角形中鄰邊比斜邊

in trigonometry, a cosine is the number you get in a right triangle by comparing the side beside an angle with the triangle's longest side.

例句

Liam used cosine to find the ladder's height against the wall.

Liam 用餘弦算出靠牆梯子的高度。

use cosine to find a missing height

Amelia checked the cosine of 60 degrees before finishing her homework.

Amelia 做完作業前先查了 60 度的餘弦值。

the cosine of [angle]

同義詞
  • cos

    the usual shortened form in formulas and on calculators

文法句型

the cosine of [angle]

find the cosine of [angle]

用法筆記

Usually appears in the pattern the cosine of [angle]. In school mathematics and on calculators, it is often shortened to cos.

常見錯誤

❌The cosine is the longest side of the triangle.
✅The cosine is the number found by comparing one side with the triangle's longest side.
💡Cosine is a ratio, not a side.
❌I drew a cosine on the paper.
✅I wrote the cosine for the angle on the paper.
💡Cosine is a value or function, not a shape you draw.