Answer:
C. pi/2 radians
Step-by-step explanation:
other guy was right
[tex]\rm \frac{PI}{2}[/tex] Is the angle has its terminal side on the positive y-axis. Option C is correct.
The angle between the terminal side of the angle and the x-axis is called as the reference angle.
From the given diagram, it is observed that the angle formed between the terminal side on the positive y-axis is 90°.
[tex]\rm \frac{pI}{2}[/tex] Is the angle has its terminal side on the positive y-axis.
Hence, option C is correct.
To learn more about the reference angle, refer to the link;
brainly.com/question/16210309
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