Find the Exact Value of the Expression $\tan ^ { - 1 } \left[ \tan \left( \frac { 6 \pi } { 7 } \right) \right]$

question 107

Multiple Choice

Find the exact value of the expression.
- $\tan ^ { - 1 } \left[ \tan \left( \frac { 6 \pi } { 7 } \right) \right]$

• A) \(- \frac { 6 \pi } { 7 }\)
• B) \(\frac { \pi } { 7 }\)
• C) \(\frac { 6 \pi } { 7 }\)
• D) \(- \frac { \pi } { 7 }\)

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