In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
y = sin (1/2 x)
Step 02:
Graph:
T = 2π / w
T = 2π / (1/2) = 4π
Points to plot:
x = 0:
y = sin (1/2 * 0) = sin ( 0) = 0
(0 , 0)
x = π:
y = sin (1/2 * π) = sin (π/2) = 1
( π , 1)
x = 2π:
y = sin (1/2 * 2π) = sin (π) = 0
(2π , 0)
In this way, all the points are successively calculated.
Graph:
That is the full solution.