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  1. Trigonometry - Wikipedia

    Trigonometric ratios are the ratios between edges of a right triangle. These ratios depend only on one acute angle of the right triangle, since any two right triangles with the same acute angle are similar.

  2. Trigonometry - Math is Fun

    Trigonometry helps us find angles and distances, is used a lot in science, engineering, video games, and more! The triangle of most interest is the right-angled triangle. The right angle is shown by the …

  3. Definition, Formulas, Ratios, & Identities - Britannica

    Dec 12, 2025 · Trigonometric functions are used in obtaining unknown angles and distances from known or measured angles in geometric figures. Trigonometry developed from a need to compute angles …

  4. What is Trigonometry? Formulas, Table, Examples - Cuemath

    Trigonometry is the branch of mathematics that deals with the relationship between ratios of the sides of a right-angled triangle with its angles. The ratios used to study this relationship are called …

  5. Trigonometric Functions - Definition, Formula, Table, Identities, and ...

    Feb 24, 2025 · What are the trigonometric functions. Learn how to find its values with its list, formula, properties, and examples.

  6. Trigonometric functions - Math.net

    Trigonometric functions are functions related to an angle. There are six trigonometric functions: sine, cosine, tangent and their reciprocals cosecant, secant, and cotangent, respectively.

  7. Trigonometry -- from Wolfram MathWorld

    Dec 22, 2025 · The trigonometric functions (also called the circular functions) comprising trigonometry are the cosecant cscx, cosine cosx, cotangent cotx, secant secx, sine sinx, and tangent tanx.

  8. Khan Academy | Khan Academy

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  9. 1.3: Trigonometric Functions - Mathematics LibreTexts

    In this section, we define the six basic trigonometric functions and look at some of the main identities involving these functions. To use trigonometric functions, we first must understand how to measure …

  10. Trigonometry - The Story of Mathematics

    Trigonometry especially deals with the ratios of sides in a right triangle, which can be used to determine the measure of an angle. These ratios are called trigonometric functions, and the most basic ones …