Answer:
36°
Step-by-step explanation:
The reference angle of a given angle is the corresponding acute angle it makes with the positive direction with the x-axis in the first quadrant.
We want to find the reference angle for
[tex] \theta = 144 \degree[/tex]
The acute angle it makes with the positive x-axis is
[tex]180 - 144 = 36 \degree[/tex]
since 144° is in the second quadrant.
