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What angles are coterminal to an angle measuring 2π/3 or −11π/7?

 

Coterminal with 2π/3:

Coterminal with −11π/7:

 May 19, 2020
 #1
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To find coterminal angles, add (or subtract) multiply of 2·pi

 

Therefore, angles coterminal with 2·pi/3 are  

           2·pi/3 + 2·pi,  2·pi/3 + 4·pi,  2·pi/3 + 6·pi,, ...

and     2·pi/3 - 2·pi,  2·pi/3 - 4·pi,  2·pi/3 - 6·pi,, ...

 

[you should reduce each answer]

 

Similarly, for  -11·pi/7

 May 19, 2020

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