Sin(θ+90° )三角函數角度轉換根本不用背，畫圖出來一目了然！😮 #高中數學
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高中數學 #學測數學 #數學 #國中數學 #學測 #學測倒數 #幾何解題 #競賽數學 #108課綱 #數A #數B #數學解題 ...
![[高中數學 三角函數(三角比)] #1 (講解) 直角三角形的三角函數(三角比)sin, cos, tan (邊角關係) + 分辨對邊, 鄰邊](https://i.ytimg.com/vi/Jh7qRseCE3I/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgBvgeAAtAFigIMCAAQARhlIGUoZTAP&rs=AOn4CLAyxkQwCZWI1MbDn-Hdob26JN4csQ)
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