Definition of secant in English:

secant

noun ˈsɛk(ə)ntˈsiːk(ə)nt

1Mathematics
The ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right-angled triangle); the reciprocal of a cosine.
〔数〕正切；余弦的倒数
Example sentencesExamples
- He gave a table of secants and, although Delambre credited him with the first use of this function, it had appeared earlier in the work of Copernicus.
- When you move the cursor over a button on the calculator, a description of its function appears - sine of a number, cosine, secant, etc.
- The secant and cosecant were not used by the early astronomers or surveyors.
- It also gave tables of natural sine functions to 15 decimal places, and the tan and sec functions to 10 decimal places.
- The secant of this angle is 1.61806 which is remarkably close to the golden ratio 1.618034.
2Geometry
A straight line that cuts a curve in two or more parts.
〔几何〕割线
Example sentencesExamples
- In this projection the meridians are vertical and parallels having increased spacing in proportion to the secant of the latitude.
- Note that the air mass is approximately equal to the secant of the zenith angle (that angle from directly overhead to a line intersecting the sun).
- Direct irradiance was attenuated as described by Beer's law, with the optical path length increasing approximately as the secant of the solar zenith angle.

Origin

Late 16th century; from French sécante, based on Latin secare 'to cut'.

Definition of secant in US English:

secant

noun

1Mathematics
The ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right-angled triangle); the reciprocal of a cosine.
〔数〕正切；余弦的倒数
Example sentencesExamples
- It also gave tables of natural sine functions to 15 decimal places, and the tan and sec functions to 10 decimal places.
- The secant and cosecant were not used by the early astronomers or surveyors.
- When you move the cursor over a button on the calculator, a description of its function appears - sine of a number, cosine, secant, etc.
- He gave a table of secants and, although Delambre credited him with the first use of this function, it had appeared earlier in the work of Copernicus.
- The secant of this angle is 1.61806 which is remarkably close to the golden ratio 1.618034.
2Geometry
A straight line that cuts a curve in two or more parts.
〔几何〕割线
Example sentencesExamples
- In this projection the meridians are vertical and parallels having increased spacing in proportion to the secant of the latitude.
- Direct irradiance was attenuated as described by Beer's law, with the optical path length increasing approximately as the secant of the solar zenith angle.
- Note that the air mass is approximately equal to the secant of the zenith angle (that angle from directly overhead to a line intersecting the sun).

Origin

Late 16th century; from French sécante, based on Latin secare ‘to cut’.

单词	secant
释义	Definition of secant in English: secant noun ˈsɛk(ə)ntˈsiːk(ə)nt 1Mathematics The ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right-angled triangle); the reciprocal of a cosine. 〔数〕正切；余弦的倒数 Example sentencesExamples He gave a table of secants and, although Delambre credited him with the first use of this function, it had appeared earlier in the work of Copernicus. When you move the cursor over a button on the calculator, a description of its function appears - sine of a number, cosine, secant, etc. The secant and cosecant were not used by the early astronomers or surveyors. It also gave tables of natural sine functions to 15 decimal places, and the tan and sec functions to 10 decimal places. The secant of this angle is 1.61806 which is remarkably close to the golden ratio 1.618034. 2Geometry A straight line that cuts a curve in two or more parts. 〔几何〕割线 Example sentencesExamples In this projection the meridians are vertical and parallels having increased spacing in proportion to the secant of the latitude. Note that the air mass is approximately equal to the secant of the zenith angle (that angle from directly overhead to a line intersecting the sun). Direct irradiance was attenuated as described by Beer's law, with the optical path length increasing approximately as the secant of the solar zenith angle. Origin Late 16th century; from French sécante, based on Latin secare 'to cut'. Definition of secant in US English: secant noun 1Mathematics The ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right-angled triangle); the reciprocal of a cosine. 〔数〕正切；余弦的倒数 Example sentencesExamples It also gave tables of natural sine functions to 15 decimal places, and the tan and sec functions to 10 decimal places. The secant and cosecant were not used by the early astronomers or surveyors. When you move the cursor over a button on the calculator, a description of its function appears - sine of a number, cosine, secant, etc. He gave a table of secants and, although Delambre credited him with the first use of this function, it had appeared earlier in the work of Copernicus. The secant of this angle is 1.61806 which is remarkably close to the golden ratio 1.618034. 2Geometry A straight line that cuts a curve in two or more parts. 〔几何〕割线 Example sentencesExamples In this projection the meridians are vertical and parallels having increased spacing in proportion to the secant of the latitude. Direct irradiance was attenuated as described by Beer's law, with the optical path length increasing approximately as the secant of the solar zenith angle. Note that the air mass is approximately equal to the secant of the zenith angle (that angle from directly overhead to a line intersecting the sun). Origin Late 16th century; from French sécante, based on Latin secare ‘to cut’.
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