KoreanSAT / data /json /2025 /math_14.txt
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14. κ·Έλ¦Όκ³Ό 같이 μ‚Όκ°ν˜• \(\mathrm{ABC}\)μ—μ„œ μ„ λΆ„ \(\mathrm{AB}\) μœ„μ— \(\overline{\mathrm{AD}} : \overline{\mathrm{DB}} = 3 : 2\)인 점 \(\mathrm{D}\)λ₯Ό 작고, 점 \(\mathrm{A}\)λ₯Ό μ€‘μ‹¬μœΌλ‘œ ν•˜κ³  점 \(\mathrm{D}\)λ₯Ό μ§€λ‚˜λŠ” 원을 \(O\), 원 \(O\)와 μ„ λΆ„ \(\mathrm{AC}\)κ°€ λ§Œλ‚˜λŠ” 점을 \(\mathrm{E}\)라 ν•˜μž.
\(\sin A : \sin C = 8 : 5\)이고, μ‚Όκ°ν˜• \(\mathrm{ADE}\)와 μ‚Όκ°ν˜• \(\mathrm{ABC}\)의 λ„“μ΄μ˜ λΉ„κ°€ \(9 : 35\)이닀. μ‚Όκ°ν˜• \(\mathrm{ABC}\)의 μ™Έμ ‘μ›μ˜ λ°˜μ§€λ¦„μ˜ 길이가 \(7\)일 λ•Œ, 원 \(O\) μœ„μ˜ 점 \(\mathrm{P}\)에 λŒ€ν•˜μ—¬ μ‚Όκ°ν˜• \(\mathrm{PBC}\)의 λ„“μ΄μ˜ μ΅œλŒ“κ°’μ€? (단,\( \ \overline{\mathrm{AB}} < \overline{\mathrm{AC}}\)) [4점]
\begin{itemize}
\item[1] $18 + 15 \sqrt{3}$
\item[2] $24 + 20 \sqrt{3}$
\item[3] $30 + 25 \sqrt{3}$
\item[4] $36 + 30 \sqrt{3}$
\item[5] $42 + 35 \sqrt{3}$
\end{itemize}