Geometry
# Sum and Difference Trigonometric Formulas

Which of the following is equal to

\[ \frac{ \tan 43 ^ \circ - \tan 14 ^ \circ } { 1 + \tan 43 ^ \circ \times \tan 14 ^ \circ } ? \]

Which of the following is equal to

\[ \frac{ \tan 19 ^ \circ + \tan 26 ^ \circ } { 1 - \tan 19 ^ \circ \times \tan 26 ^ \circ } ? \]

Which of the following expressions is equal to \( \tan 2 \theta \)?

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