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| cosecant |
in trigonometry, the secant of the complement or the reciprocal of the sine of a given angle or arc. |
| cosine |
in trigonometry, the ratio between the length of the side next to one of the acute angles in a right triangle and the length of the hypotenuse. |
| cotangent |
in trigonometry, the ratio between the side adjacent to a given acute angle in a right triangle and the opposite side. |
| sine |
in trigonometry, the ratio, in a right triangle, of the length of a side opposite an acute angle to the length of the hypotenuse. [1/2 definitions] |
| trig |
(informal) trigonometry. |
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