Write the Expression as the Sine, Cosine, or Tangent of a Double

question 57

Multiple Choice

Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.
- $$\frac { 2 \tan \frac { 7 \pi } { 12 } } { 1 - \tan ^ { 2 } \frac { 7 \pi } { 12 } }$$

• A) \(\frac { \sqrt { 3 } } { 3 }\)
• B) \(- \frac { \sqrt { 3 } } { 3 }\)
• C) \(\sqrt { 3 }\)
• D) \(- \sqrt { 3 }\)

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