English > circular function: 1 sense > noun 1, relation| Meaning | function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle. |
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| Synonym | trigonometric function |
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| Narrower | arc cosecant, arccosecant, inverse cosecant | The angle that has a cosecant equal to a given number |
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| arc cosine, arccosine, arccos, inverse cosine | The inverse function of the cosine |
| arc cotangent, arccotangent, inverse cotangent | The inverse function of the cotangent |
| arc secant, arcsecant, arcsec, inverse secant | The inverse function of the secant |
| arc sine, arcsine, arcsin, inverse sine | The inverse function of the sine |
| arc tangent, arctangent, arctan, inverse tangent | The inverse function of the tangent |
| cosecant, cosec | Ratio of the hypotenuse to the opposite side of a right-angled triangle |
| cosine, cos | Ratio of the adjacent side to the hypotenuse of a right-angled triangle |
| cotangent, cotan | Ratio of the adjacent to the opposite side of a right-angled triangle |
| secant, sec | Ratio of the hypotenuse to the adjacent side of a right-angled triangle |
| sine, sin | Ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle |
| tangent, tan | Ratio of the opposite to the adjacent side of a right-angled triangle |
| Broader | function, mathematical function, single-valued function, map, mapping | (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function) |
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| Spanish | función trigonométrica |
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