cosine

/ˈkəʊ.saɪn/ /ˈkoʊ.saɪn/

Meanings

noun

余弦

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

Examples :

"In Mr. Jones' math class, Sarah learned that the cosine of a 30-degree angle in a right triangle is the length of the adjacent side divided by the length of the hypotenuse. "

在琼斯老师的数学课上，萨拉学到，直角三角形中30度角的余弦值，就是这个角的邻边长度除以斜边长度。

math science

Related Words

adjacent noun

/əˈdʒeɪ.sənt/

邻边，毗邻。

"The adjacent room to the classroom was used for storage. "

紧挨着教室的那个房间被用作储藏室。

learned adjective

/ˈlɜːnɪd/ /ˈlɝnɪd/ /lɜːnd/ /lɝnd/

博学的，有学问的

"Professor Davies is a learned scholar, renowned for her deep knowledge of ancient history. "

戴维斯教授是一位博学的学者，以其对古代历史的渊博知识而闻名。

angle noun

/ˈæŋ.ɡəl/

角度, 角。

"the angle between lines A and B"

直线A和直线B之间的夹角。

symbol noun

/ˈsɪmbəl/

符号，象征。

"$ is the symbol for dollars in the US and some other countries."

$ 是美国和一些其他国家表示美元的符号。

acute noun

/əˈkjuːt/ /əˈkjut/

急性患者

"The doctor diagnosed Sarah with an acute case of schizophrenia. "

医生诊断出莎拉患有急性精神分裂症，她属于急性患者。

right adjective

/ˈɹaɪt/

直的，笔直的。

"a right line"

一条直线

degree noun

/dɪˈɡɹiː/

学位，学历

"My sister earned a degree in psychology from the university. "

我姐姐从大学获得了心理学学位。

triangle noun

/ˈtɹaɪəŋɡəl/ /ˈtɹaɪˌæŋɡəl/

三角形

"The construction paper shape was a triangle. "

那张彩色卡纸的形状是个三角形。

divided verb

/dɪˈvaɪdɪd/ /dəˈvaɪdɪd/

分开，分割

"a wall divides two houses; a stream divides the towns"

一堵墙把两栋房子分隔开；一条小溪把两个镇子分割开。

hypotenuse noun

/haɪˈpɒtənjuːz/ /haɪˈpɑt̬ənjus/

直角三角形的斜边, 斜边

"The hypotenuse of the right triangle on my math homework is the longest side. "

我数学作业上的直角三角形，它的斜边是最长的那条边。

length noun

/lɛn(t)θ/

长度，长短。

"The length of the classroom is 20 meters. "

教室的长度是二十米。

ratio noun

/ˈɹeɪ.ʃi.əʊ/ /ˈɹeɪ.ʃiˌoʊ/

比例，比率

"The ratio of boys to girls in the class is 2 to 3. "

这个班里男生和女生的比例是二比三。(Zhège bān lǐ nánshēng hé nǚshēng de bǐlì shì èr bǐ sān.)