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In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.

Feb 4, 2025 · Definition: Cosine is the ratio of the adjacent side to the hypotenuse in a right triangle, or the x-coordinate of a point on the unit circle. Range: The values of cosine lie between –1 and 1. Periodicity: Cosine is a periodic function with a period of 360° (or 2π radians), meaning it repeats every full circle.

In computes sine, cosine, tangent, and their reciprocal. Calculates arcsin, arccos, and arctan values inside inverse trigonometric equations.

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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

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).

Half-Angle Formulas. Applications: Rutherford scattering

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