Use Sum and Difference Formulas for Tangents
Find the Exact $$\frac { \tan 70 ^ { \circ } - \tan \left( - 50 ^ { \circ } \right) } { 1 + \tan 70 ^ { \circ } \tan \left( - 50 ^ { \circ } \right) }$$

question 225

Multiple Choice

Use Sum and Difference Formulas for Tangents
Find the exact value by using a difference identity.
- $$\frac { \tan 70 ^ { \circ } - \tan \left( - 50 ^ { \circ } \right) } { 1 + \tan 70 ^ { \circ } \tan \left( - 50 ^ { \circ } \right) }$$

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

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