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英語 高校生

関係詞の分野です。至急解答をお願いします🙏

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未解決 回答数: 1
数学 高校生

図形についての問題です。 この(2)の解説がよく分からないです。 ・なぜ分母が最大の時分数の値が最大になるのですか? ・2sinθが分母なのに2は考えず、sinθの範囲だけ求め るのはなぜですか? ・sinθが1の時なぜ最小になるのですか? 質問多くてすみません。全... 続きを読む

[2] 鋭角三角形 ABCの辺BC上(両端を除く)に点Pがある。△ABP の外接円の半径 と△ACP の外接円の半径の和が最小となるような点Pはどの位置にあるかを考察する。 ( ・考察・ it st BO BC=α, CA = b, AB = c とし, △ABP の外接円の半径をR1, △ACP の外接円の半 (003 ART 34 U DAN T O T COA COX (2) | 径をRとする。 ∠BPA = 0 とし, 正弦定理により R1 をc, sine を用いて表すと, R1= MOR (1) である。 また,同様に R2 をb, sin 0 を用いて表すと, R2 = (イ) 同様にRob, sing を用いており sin Q を用いて表すと, SKOCZOTOSHOXFCO $300 (イ) を正しくうめよ。 prox 301 1 (2) 点Pの位置は,考察で用いた 0 の値によって定まる。 △ABP の外接円の半径と △ACP の外接円の半径の和 R1+R2 が最小となるような0の値, および R1+R2 の最小 値を求める過程とともに解答欄に記述せよ。 ただし, R1+R2 の最小値は考察で用いた *>501312AD b,c を用いて表せ。 (配点 10) > BAN R2=(1) である。 JA

解決済み 回答数: 1