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求正弦曲線y=R*sin(a),當(dāng)從a1點(diǎn)移到a2點(diǎn)在y方向走過的路程 |
點(diǎn)評(píng)
1.求一個(gè)“解析式”
2.解析式比較困難的話,求“路程”.
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