Tuesday, 7 April 2020

F5 add math (6/4) - trigo 30°,60° & 45°

授课内容：< Trigonometric >

请大家把题目和答案都抄在纸上。

（可以点击放大题目的图片)
也可以点击视频的右下角，来放大讲解视频：


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