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  1. Trigonometric functions - Wikipedia

    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 …

  2. Trigonometric Identities - Definition, List, Proofs, and Examples

    Mar 7, 2025 · Trigonometric identities are classified based on the type of relationships they describe among trigonometric functions. These identities express the reciprocal relationships between sine, …

  3. Trigonometry | Definition, Formulas, Ratios, & Identities ...

    There are six functions of an angle commonly used in trigonometry. Their names and abbreviations are sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc). These six …

  4. Trigonometric functions - Math.net

    Trigonometric functions are also called circular functions. The table below shows the six trigonometric function values for the specified angles in both degrees and radians.

  5. Introduction to 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 …

  6. Trigonometric functions | Algebra (all content) - Khan Academy

    Test your understanding of Trigonometric functions with these 13 questions.

  7. 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 …