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A geometric way of deriving the sine or cosine of 45° is by considering an isosceles right triangle with leg length 1. Since two of the angles in an isosceles triangle are equal, if the remaining angle is 90° for a right triangle, then the two equal angles are each 45°.
Madhava's sine table is the table of trigonometric sines constructed by the 14th century Kerala mathematician-astronomer Madhava of Sangamagrama (c. 1340 – c. 1425). The table lists the jya-s or Rsines of the twenty-four angles from 3.75° to 90° in steps of 3.75° (1/24 of a right angle, 90°).
Digital Public Library of America. Miscellaneous items related to Spanish-language newspapers "Spanish". Chicago Foreign Language Press Survey. Chicago Public Library Omnibus Project of the Works Progress Administration of Illinois. 1942 – via Newberry Library. (English translations of selected Spanish-language newspaper articles, 1855–1938).
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 ...
Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle' and μέτρον (métron) 'measure') [1] is a branch of mathematics concerned with relationships between angles and side lengths of triangles.
x is the argument of the complex number (angle between line to point and x-axis in polar form). The notation is less commonly used in mathematics than Euler's formula, e ix, which offers an even shorter notation for cos x + i sin x, but cis(x) is widely used as a name for this function in software libraries.
This is the pronunciation key for IPA transcriptions of Spanish on Wikipedia. It provides a set of symbols to represent the pronunciation of Spanish in Wikipedia articles, and example words that illustrate the sounds that correspond to them.
The coversed sine or coversine [20] (in Latin, cosinus versus or coversinus), abbreviated coversin, [21] covers, [22] [23] [24] cosiv, or cvs [25] The coversed cosine [26] or covercosine, abbreviated covercosin, covercos, or cvc; In full analogy to the above-mentioned four functions another set of four "half-value" functions exists as well: