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HW Score: \( 9.09 \%, 1 \) of 11 points
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Question 2, 5.4.11
Points: 0 of 1
Use a sum or difference identity to find the exact value of the expression.
\[
\tan 15^{\circ}
\]
\[
\tan 15^{\circ}=\square
\]
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)
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