Created the division of a circle into 360 degrees and made one of the first trigonometric tables for solving triangles.
It is a number - in trigonometry or elsewhere.
Trigonometry is used effectively in electronics.
There is no single law in trigonometry so the question makes no sense.
SoH: used for finding the sine of a triangle in trigonometry: Opposite/HypotenuseCaH: used for finding the cosine of a triangle in trigonometry: Adjacent/HypotenuseToA: used for finding the tangent of a triangle in trigonometry: Opposite/Adjacent
Several great mathematicians have made contributions to trigonometry. Pitiscus wrote books on plane and spherical trigonometry, and Hipparchus produced a table of chords.
Bartholomaeus Pitiscus was born in 1561.
Bartholomaeus Pitiscus died in 1613.
Samuel Pitiscus died in 1727.
Samuel Pitiscus was born in 1637.
The largest contribution Claude Ptolemy made to trigonometry was the table containing the lengths of chords in a circle. This is one of the oldest tables still used in trigonometry today.
He defined the spherical triangle
He introduced coordinated geometry