si( z )

The si of z in Math. Defined by

\[ si (z) = \int \frac{ sin(z) }{ z } \]

sin(x) in 2D graph.

sin(x*y) in 3D graph.

Real part on the real axis:

Imaginary part on the real axis is zero.

Real part on the imaginary axis is zero.

Imaginary part on the imaginary axis:

Real part on the complex plane:

Imaginary part on the complex plane:

Absolute value on the complex plane:

Related functions:   cos   csc   arcsin

Function category: circular functions