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Find the Exact Value of the Expression $\tan ^ { - 1 } \left[ \tan \left( - \frac { \pi } { 8 } \right) \right]$

Question 65

Question 65

Multiple Choice

Find the exact value of the expression. Do not use a calculator.
- $\tan ^ { - 1 } \left[ \tan \left( - \frac { \pi } { 8 } \right) \right]$

A) $- 8 \pi$
B) $\frac { \pi } { 8 }$
C) $8 \pi$
D) $- \frac { \pi } { 8 }$

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