斜角
斜角又稱傾斜角直線與 x 軸所夾的最小正角，稱為此直線的斜角。斜角的範圍為0°≦ θ <180°，而 θ 的正切函數值為直線的斜率 ，即 m = tanθ
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.
斜角又稱傾斜角直線與 x 軸所夾的最小正角，稱為此直線的斜角。斜角的範圍為0°≦ θ <180°，而 θ 的正切函數值為直線的斜率 ，即 m = tanθ