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Trigonometry
Question

Find the measures of two angles, one positive and ...

Find the measures of two angles, one positive and one negative, that are coterminal with the given angle. 

\(\frac { 9 \pi } { 7 } ; - \frac { 9 \pi } { 7 } \) 

\( \frac { 16 \pi } { 7 } ; - \frac { 12 \pi } { 7 } \) 

\( \frac { 12 \pi } { 7 } ; - \frac { 16 \pi } { 7 } \) 

\( \frac { 9 \pi } { 7 } ; - \frac { 12 \pi } { 7 } \) 

Answer

hence B is the correct answer

 

\(\frac { 16\pi } { 7} \) and -\(\frac { 12\pi } { 7} \)

Solution
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