Find the Exact Value of the Expression $\tan \left[ \tan ^ { - 1 } ( - 0.4 ) \right]$

question 330

Multiple Choice

Find the exact value of the expression. Do not use a calculator.
- $\tan \left[ \tan ^ { - 1 } ( - 0.4 ) \right]$

• A) \(- 0.6\)
• B) \(- 0.4\)
• C) \(- 2.3652\)
• D) \(- 2.5\)

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