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  2. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    A formula for computing the trigonometric identities for the one-third angle exists, but it requires finding the zeroes of the cubic equation 4x 3 − 3x + d = 0, where is the value of the cosine function at the one-third angle and d is the known value of the cosine function at the full angle.

  3. Proofs of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/Proofs_of_trigonometric...

    For example, the sine of angle θ is defined as being the length of the opposite side divided by the length of the hypotenuse. The six trigonometric functions are defined for every real number, except, for some of them, for angles that differ from 0 by a multiple of the right angle (90°). Referring to the diagram at the right, the six ...

  4. Sine and cosine - Wikipedia

    en.wikipedia.org/wiki/Sine_and_cosine

    In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that ...

  5. Glossary of physics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_physics

    The degree to which a structural element is displaced under a load. It may refer to an angle or a distance. deformation 1. (mechanics) 2. (engineering) density. Also called mass density. A physical property of a substance defined as its mass per unit volume. derivative

  6. atan2 - Wikipedia

    en.wikipedia.org/wiki/Atan2

    atan2(y, x) returns the angle θ between the positive x-axis and the ray from the origin to the point (x, y), confined to (−π, π].Graph of ⁡ (,) over /. In computing and mathematics, the function atan2 is the 2-argument arctangent.

  7. List of medical roots, suffixes and prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_medical_roots...

    Greek στενός (stenós), narrow, short; + -σῐς (-sis), added to verb stems to form abstract nouns or nouns of action, result or process restenosis, stenosis: steth-of or pertaining to the upper chest, the area above the breast and under the neck Greek στῆθος (stêthos), chest, cuirass: stethoscope: stheno-strength, force, power

  8. List of glossing abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_glossing_abbreviations

    Exceptions include proper nouns, which typically are not translated, and kinship terms, which may be too complex to translate. Proper nouns/names may simply be repeated in the gloss, or may be replaced with a placeholder such as "(name. F)" or "PN(F)" (for a female name). For kinship glosses, see the dedicated section below for a list of ...

  9. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    In the following definitions, the hypotenuse is the side opposite to the 90-degree angle in a right triangle; it is the longest side of the triangle and one of the two sides adjacent to angle A. The adjacent leg is the other side that is adjacent to angle A .