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  1. Sine, Cosine and Tangent - Math is Fun

    Sine, Cosine and Tangent are the main functions used in Trigonometry and are based on a Right-Angled Triangle. Before getting stuck into the functions, it helps to give a name to each side of …

  2. Sine Function in Math – Definition, Formula, Examples

    Feb 18, 2025 · The sine function, commonly written as sin (θ), is the ratio of the opposite side to the hypotenuse of a right triangle. It is one of the primary trigonometric functions used in …

  3. Sine and cosine - Wikipedia

    In mathematics, sine and cosine are trigonometric functions of an angle.

  4. Sine Function - GeeksforGeeks

    Jul 23, 2025 · We have a very important law in mathematics that is used widely in trigonometry. This law is used to calculate the ratio of the length of a side and the sine of the angle opposite …

  5. Sine | Definition, Formulas, & Facts | Britannica

    sine, one of the six trigonometric functions, which, in a right triangle ABC, for an angle A, is sin A = length of side opposite angle A/ length of hypotenuse. (The other five trigonometric functions …

  6. Sine - Math.net

    Sine, written as sin⁡ (θ), is one of the six fundamental trigonometric functions. There are two main ways in which trigonometric functions are typically discussed: in terms of right triangles …

  7. Sin Formula - Learn the Formula to Calculate Sin Values - Cuemath

    What Is the Sin Formula? The sine of an angle of a right-angled triangle is the ratio of its perpendicular (that is opposite to the angle) to the hypotenuse. The sin formula is given as: sin …

  8. The sine function - math word definition - Math Open Reference

    Sine (sin) function - Trigonometry In a right triangle, the sine of an angle is the length of the opposite side divided by the length of the hypotenuse.

  9. What is a Sine Function? - Gauth

    In physics, the sine function is used to describe wave motion, such as sound waves and electromagnetic waves. For example, the equation of a simple harmonic wave is given by: …

  10. Sine: Definition - Math.com

    Given any angle q (0 £ q £ 90°), we can find the sine of that angle by constructing a right triangle with one vertex of angle q. The sine is equal to the length of the side opposite to q, divided by …