## Definition of the

Mode and radiation angle is the two basic elements represented by the plural triangle, and the vector length corresponding to the plural is referred to as the magnitude of the plural, the vector and the real shaft The angle of the angle is the inclusion angle. The size of the radiation is infinite, but the radiomor is uniquely determined.

Due to a plural

can be determined by the ordered real number to

, an ordered real number pair with a plane right angle coordinate system

Correspondingly, the plurality of points can be represented by the point

of the coordinates, at this time, the point of the

axis corresponds to the real number, The point of the

axis, the point on the

axis (except for origin) corresponds to the pure amount, namely the

axis is a virtual axis, as in this way The plane of the plural is called a complex.

multiple

is used to indicate and is vector in axis. In this way, the plural establishes a corresponding relationship with the vector on the plane. vector

is called the mode or absolute value of the plural

, record

, so

is not the original point, ie, multiple , vector and The angle of the axis is referred to as the radiation angle of the plural , which is recorded as . The symbols of the radiation are specified as: from the front-axis inverse clockwise direction to is positive, and it is negative in as a negative. Obviously a non-zero-recollection

has an endless multiple values, they differ in the integer multiple of , but There is only one value satisfying the condition , called is the radio angle of the plural , records , So When

, the radiation angle of is meaningless. ## Calculation of radioactor

multiple

of the main correspondence and annectable primary value has the following relationship: