cosine

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

cosine — noun

  • cosinesingular
  • cosinesplural

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

1.名詞B2
釋義

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.

use cosine to find a missing height

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

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.