Trigonometry
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Trigonometry is a branch of mathematics concerned with relationships between angles and side lengths of triangles. In particular, the trigonometric functions relate the angles of a right triangle with
Sextants are used to measure the angle of the sun or stars with respect to the horizon. Using trigonometry and a marine chronometer, the position of the ship can be determined from such measurements.
Hipparchus, credited with compiling the first trigonometric table, has been described as "the father of trigonometry".
Sine and cosine
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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
Trigonometry
…chords, while mathematicians in India created the earliest-known tables of values for trigonometric ratios (also called trigonometric functions) such as sine. Throughout history, trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics, and navigation…
Domain coloring of sin(z) in the complex plane. Brightness indicates absolute magnitude, hue represents complex argument.
Quadrant from 1840s Ottoman Turkey with axes for looking up the sine and versine of angles