The reciprocal of any function f(x) is 1/f(x) provided that f(x) is non-zero.
That applies to all relations in mathematics, not just trigonometry.
cosecant = 1/sine secant = 1/cosine cotangent = 1/tangent
It is the reciprocal of the sine ratio.
Hipparchus is considered as the father of trigonometry. he was the one who found the relation between angles of a triangle and its lengths of sides. this relation has developed into an entirely new branch in mathematics as trigonometry. so, one might as well say that he 'made' trigonometry.
reciprocal relation
In geometry, angles are studied mostly in relation to each other. In Trigonometry, angles are studied in relation to side lengths and triangles.
There is no direct relationship. Trigonometry can be used in criminology as can many branches of mathematics and of science.
Having a mutual or reciprocal relation or parallelism; correlative.
None. There are relations to power sequences, though.
mutual or reciprocal relation or relatedness; "interrelationships of animal structure and function
The uses of Sin, Cos etc. in Maths is in relation to Trigonometry. Trigonometry is the study of the relationship between angles and lengths of triangles.
Trigonometry includes 12 baisic functions. Sine, Cosine, and Tangent are the three most baisic. Each of those functions has a reciprocal. Cosine's reciprocal is Secant, Sine reciprocal is Cosecant, and Tangent's reciprocal is Cotangent. Each of those six functions has an inverse funcion called Inverse Sine, Cos etc... or Arcsine, Arcosine, Arcsecant, etc.... The shorthand for each function is sin, caos, tan, sec, csc, cot. The inverses have a -1 notation like sin-1.
The inverse of sine (sin) is cosecant (csc). The inverse of cosine (cos) is secant (sec). The inverse of tangent (tan) is cotangent (cot).