【108課綱】國中數學 / 九上 / 特殊直角三角形的邊長比 / 會考數學
Synopsis
大家還記得嗎？有sin、cos、tan！ 這次學霸名師要來介紹特殊的直角三角形！ 有哪些特殊的直角三角形呀？ 30度-60度-90度以及45 ...
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