Answer:
[tex]\dfrac{21\pi}{10},\ -\dfrac{19\pi}{10}[/tex]
Step-by-step explanation:
Any of the angles (in radians) π/10 +2kπ (k any integer) will be co-terminal with π/10. The angles listed in the answer above have k=1, k=-1.
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Comment on the last answer choice
The answer choices π/10+360° and π/10-360° amount to the same thing as the answer shown above, but use mixed measures. 1 degree is π/180 radians, so 360° is 2π radians. Then π/10+360° is fully equivalent to 21π/10 radians.
