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- Dictionaryco·sine/ˈkōˌsīn/
noun
- 1. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
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divided by the length of the hypotenuse. The abbreviation is cos. cos (θ) = adjacent / hypotenuse. Illustrated definition of Cosine: In a right angled triangle, the cosine of an angle is: The length of the adjacent sidebrdivided by the length...
The cosine function (or cos function) in a triangle is the ratio of the adjacent side to that of the hypotenuse. The cosine function is one of the three main primary trigonometric functions and it is itself the complement of sine(co+sine).
In mathematics, sine and cosine are trigonometric functions of an angle.
What is the Meaning of Cosine? The cosine can be defined as the ratio of the length of the base to the length of the hypotenuse in a right-angled triangle. It gives the value of the cosine function for angle x, denoted by cos x.
Jun 7, 2024 · Cosine, one of the six trigonometric functions, which, in a right triangle ABC, for an angle A, is cos A = length of side adjacent to angle A length of hypotenuse .(The other five trigonometric functions are sine [sin], tangent [tan], secant [sec], cosecant [csc], and cotangent [cot].)
Cosine, written as cos (θ), is one of the six fundamental trigonometric functions. Cosine definitions. There are two main ways in which trigonometric functions are typically discussed: in terms of right triangles and in terms of the unit circle.
Sine, Cosine and Tangent (often shortened to sin, cos and tan) are each a ratio of sides of a right angled triangle: For a given angle θ each ratio stays the same. no matter how big or small the triangle is. To calculate them: Divide the length of one side by another side. Example: What is the sine of 35°?
The cosine function is defined by determining the ratio of the length of the side right next to a reference angle (acute angle) to the length of the hypotenuse of a right triangle.
Means: The angle whose cosine is 0.5 is 60 degrees. We use it when we know what the cosine of an angle is, and want to know the actual angle. See also Arccosine definition and Inverse functions - trigonometry
The common schoolbook definition of the cosine of an angle in a right triangle (which is equivalent to the definition just given) is as the ratio of the lengths of the side of the triangle adjacent to the angle and the hypotenuse , i.e., (1)
