Use a Sum or Difference Identity to Find the Exact $$\frac { \tan 100 ^ { \circ } - \tan ( - 20 ) ^ { \circ } } { 1 + \tan 100 ^ { \circ } \tan ( - 20 ) ^ { \circ } }$$

question 345

Multiple Choice

Use a sum or difference identity to find the exact value.
- $$\frac { \tan 100 ^ { \circ } - \tan ( - 20 ) ^ { \circ } } { 1 + \tan 100 ^ { \circ } \tan ( - 20 ) ^ { \circ } }$$

• A) \(- \frac { \sqrt { 3 } } { 3 }\)
• B) \(- \frac { 1 } { 2 }\)
• C) \(- 2\)
• D) \(- \sqrt { 3 }\)

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