SOLUTION: which of the following is co-terminal to 2pi/9 a) 20pi/9 b) -15pi/7 c) -17pi/9 d) pi/9

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Question 914157: which of the following is co-terminal to 2pi/9
a) 20pi/9
b) -15pi/7
c) -17pi/9
d) pi/9
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
which of the following is co-terminal to 2pi/9
a) 20pi/9
b) -15pi/7
c) -17pi/9
d) pi/9
..
co-terminal angle=-2π+2π/9=(-18/9)π+(2/9)π=-16π/9
(none of the answers above)