The phase, kx+wt+f, is
measured in radians. When you calculate the value of sin(kx+wt+f),
either

- set your calculator in the radian angle mode,

or - if you want to work in the degree mode, make sure that you convert the phase into degrees.

Example

A sinusoidal wave is described by

where y and x are in meters and t in seconds. Find the displacement at
x = 6.0 m and at t = 4.0 s.

Answer

__Calculator: rad mode
__or