【北师大版】九年级下册数学教案全套【九年级下教案｜全套】目录第一章直角三角形的边角关系...........................................................................................................................1§1.1从梯子的倾斜程度谈起（第一课时）.................................................................................................1§1.1从梯子的倾斜程度谈起（第二课时）....................................................................................................4§1.230°、45°、60°角的三角函数值.....................................................................................................81.5测量物体的高度....................................................................................................................................15第一章回顾与思考.........................................................................................................................................18第二章二次函数.................................................................................................................................................23§2.1二次函数所描述的关系......................................................................................................................23§2.2结识抛物线..........................................................................................................................................28§2.3刹车距离与二次函数..........................................................................................................................30§2.4二次函数cbxaxy2的图象（第一课时）............................................................................34§2.4二次函数cbxaxy2的图象（第二课时）...........................................................................36§2.4二次函数cbxaxy2的图象习题课(两课时）......................................................................38§2.5用三种方式表示二次函数..................................................................................................................45§2.6何时获得最大利润..........................................................................................................