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Question #b7743

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Apr 6, 2017

$\frac{7 π}{9}$ $(7pi)/9$

Explanation:

You can always add or subtract $2 π$ $2pi$ to an angle in radians without changing its value.

If you add $2 π$ $2pi$ to $- \frac{11 π}{9}$ $-(11pi)/9$ , you get $\frac{7 π}{9}$ $(7pi)/9$ , which is between $0$ $0$ and $2 π$ $2pi$ radians.

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