Yes, but it is called a hyberbolic trigonometric function
The sine of an angle is the cosine of its complement and conversely. The tan of an angle is the reciprocal of its complement.
Trigonometry is the study of the relationships between the sides and the angles of triangles and with the trigonometric functions, which describe those relationships.
Trigonometric ratios are characteristics of angles, not of lengths. And, by definition, the corresponding angles an similar triangles have the same measures.
It is a trigonometric function. It is also continuous.
Complements are defined for angles, not trigonometric ratios of angles.
An antitrigonometric function is another term for an inverse trigonometric function.
The trigonometric function of an angle gives a certain value The arc trigonometric function of value is simply the angle For example, if sin (30 degrees) = 0.500 then arc sine ( 0.500) = 30 degrees
One cannot actually purchase cotangent, as it is not a service or a product. Cotangent is actually a trigonometric function comparing the angles of right triangles.
Yes, since it has vertices it has angles and since it has angles it has trigonometric ratios
You can use them to find the sides and angles of a right triangle... just like regular trigonometric functions