第6題怎麼算 - Clearnote

Mathematics

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over 9 yearsago

第6題怎麼算

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over 9 yearsago

它給你的A、B橫座標就是x座標
然後因為是單位圓所以半徑r=1
就可以算出α、β的sin跟cos
然後再套公式答案就出來嘍

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