Find the Exact Value by Using a Half-Angle Identity $\tan \frac { 7 \pi } { 8 }$

question 4

Multiple Choice

Find the exact value by using a half-angle identity.
- $\tan \frac { 7 \pi } { 8 }$

• A) \(- 1 + \sqrt { 2 }\)
• B) \(1 - \sqrt { 2 }\)
• C) \(- 1 - \sqrt { 2 }\)
• D) \(1 + \sqrt { 2 }\)

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