Mathematics
Senior High
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なぜこのような答えになるのでしょうか??途中式の回答を見ても理解できません💦お願いします🙇🏻♀️
0≦x 180°のとき、y=-2cosx-2/3 sint +1 について次の問いに答えよ。
(1) sing=t とおいてyをtを用いて表せ。
y=212-2/3t-1 (O≤ t ≤1)
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