sine
/saɪn/ (bre, ipa) · /saɪn/ (ame, ipa) · /ˈsīn/ (ame, mw)
sine — 名詞
- sinesingular
- sinesplural
1. For a triangle containing a 90° corner, the sine of a smaller angle is the numbe
正弦
直角三角形中對邊與斜邊的比值
For a triangle containing a 90° corner, the sine of a smaller angle is the number that results from dividing the opposite side's length by the longest side's length.
To find the sine of an angle in a right triangle, divide the opposite side by the hypotenuse.
要找出直角三角形中某角的正弦，就用對邊長除以斜邊長。
sine of [angle] = opposite ÷ hypotenuse
Mei calculated the sine of 30 degrees and got 0.5, just as her textbook said.
Mei 算出 30 度的正弦是 0.5，跟課本寫的一模一樣。
sine of [angle] = numerical value
Kenji calculated the sine of angle A as 0.8 using the sides of his right triangle.
Kenji 用他那個直角三角形的邊長算出 A 角的正弦值為 0.8。
The sine of a 45-degree angle always equals about 0.707, no matter how big or small the triangle is.
45 度的正弦永遠約等於 0.707，不管三角形是大還是小。
Sofia used the sine button on her calculator to finish her trigonometry homework.
Sofia 用計算機上的正弦鍵來完成她的三角函數作業。
- sin
Standard abbreviation used in formulas and on calculators; identical meaning.
用法筆記
Mainly used in geometry and trigonometry contexts. The sine function also appears in physics and engineering for describing wave patterns.