The versine, coversine, haversine, and exsecant were used in navigation. For example, the haversine formula was used to calculate the distance between two points on a sphere. They are rarely used today.
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Multiple-angle formulae Double-angle, triple-angle, and half-angle formulae Double-angle formulae Triple-angle formulae ...
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These are also known as the addition and subtraction theorems or formulae . The identities can be derived by combining right triangles ... -
By examining the unit circle, the following properties of the trigonometric functions can be established. Symmetry When the trigon...
Showing posts with label Historical shorthands. Show all posts
Showing posts with label Historical shorthands. Show all posts
Sunday, November 27, 2016
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