cos15度的相關文章
cos15度===_知道
瀏覽:734
日期:2026-04-24
提問者採納: cos15=cos(45-30) = cos45cos30+sin45sin30 然後你會嗎?把值帶進去就可以了!作業還是自己做好,如果你不會我給你講!!...看更多








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