The ratio of the length s of the arc by the radius r of the circle is the number of in the angle.
The complex conjugate is particularly useful for simplifying the division of complex numbers.
Angles resulting from exercise 2.
However, supplementary angles do not have to be on the same line, and can be separated in space.
Like wise what is the conjugate variable for angular momentum? In this case, the angles α and ÎČ in the figure have a common vertex and their sides are common, therefore they are adjacent.
Even more general is the concept of for operators on possibly infinite-dimensional complex.