1.二倍角公式半角公式
![](https://picx.zhimg.com/v2-476410f79b4a195cdafa66cc925eaa94_720w.jpg?source=8673f162)
![](https://pic1.zhimg.com/v2-ab26dc09030c63d9ba6e9c3430a7fa3c_720w.jpg?source=8673f162)
![](https://pica.zhimg.com/v2-021b400ea484f6a71af47cb0d824a343_720w.jpg?source=8673f162)
2.和角公式
![](https://picx.zhimg.com/v2-a0f43fec6714b019285e634a93b13f06_720w.jpg?source=8673f162)
3.平方求和
![](https://pic1.zhimg.com/v2-453e6b544f5d955b426ca4675877b25a_720w.jpg?source=8673f162)
![](https://pic1.zhimg.com/v2-c818785c5a945e056d9e10d0bbd6b5ca_720w.jpg?source=8673f162)
![](https://pic1.zhimg.com/v2-085df6343e09bdc587b55d315a628e8b_720w.jpg?source=8673f162)
![](https://pica.zhimg.com/v2-9795879b9d5581a5974d823e9f55db1b_720w.gif?source=8673f162)
4.立方求和
![](https://picx.zhimg.com/v2-d6b21be500d59edd8b98b641ad3f90d2_720w.jpg?source=8673f162)
5.曲面可以完全由直线构成
![](https://pic1.zhimg.com/v2-0f0a1e4c9ce0ff74126a280a5e2732da_720w.gif?source=8673f162)
![](https://picx.zhimg.com/v2-a6768f254b1a6425cf78ea02dce96258_720w.gif?source=8673f162)
![](https://pic1.zhimg.com/v2-68eca0b10be66b47b15ac9d30b69c46b_720w.gif?source=8673f162)
6.勾股定理
![](https://picx.zhimg.com/v2-91fe72a541298df2a0242e6e7c798582_720w.gif?source=8673f162)
![](https://pic1.zhimg.com/v2-030e2275b3ef84c7f2efbeafd8840b9e_720w.jpg?source=8673f162)
7.求和级数展开
![](https://pic1.zhimg.com/v2-59e11f898bea2065652a4cbf235cfccb_720w.jpg?source=8673f162)
![](https://pica.zhimg.com/v2-2d5e3e14b0c8a0f27052acd9185f2ce4_720w.jpg?source=8673f162)
8.泰勒展开
![](https://pica.zhimg.com/v2-4b118cf346a562a3e0d94fa57a5375a4_720w.jpg?source=8673f162)
![](https://picx.zhimg.com/v2-7721501a1b01613c412913bbf3a31fd4_720w.gif?source=8673f162)
![](https://picx.zhimg.com/v2-c671a7702515b6f5ac64ca146f2304d3_720w.jpg?source=8673f162)
![](https://pica.zhimg.com/v2-ee22f639c0f80edd83f1ce0626a53447_720w.gif?source=8673f162)
9.多边形外角和等于 360 度
![](https://picx.zhimg.com/v2-ec01e0295a2823a313300bbadeb86a00_720w.gif?source=8673f162)
10.前 n 个数相加
![](https://picx.zhimg.com/v2-2e05a4e4dac63ea0d79ab4ba3b2dc3a8_720w.jpg?source=8673f162)
11.不等式
![](https://picx.zhimg.com/v2-07493c997eed6fa3b5ec649b2129912d_720w.jpg?source=8673f162)
12.平方和与平方差
![](https://pic1.zhimg.com/v2-4e6c646d257c789df0ef6e92774a7f65_720w.jpg?source=8673f162)
13.无穷级数求和
![](https://picx.zhimg.com/v2-f8ccd0b7ecfcc648700b1b4a68ebee50_720w.jpg?source=8673f162)
14.完全立方和公式
![](https://pic1.zhimg.com/v2-c5226828bad5aa8def89e6306a47a609_720w.jpg?source=8673f162)
15.立方差公式
![](https://picx.zhimg.com/v2-797147aee513c066bd670cc594d5f28e_720w.jpg?source=8673f162)
16.π 与理想弹性碰撞
![](https://pic1.zhimg.com/v2-2a235f0cc048b8d19068b124c17476f1_720w.gif?source=8673f162)
17.拖勒密定理
![](https://picx.zhimg.com/v2-ad250c46d5907bb2fa3bca328703efe7_720w.jpg?source=8673f162)
18.斐波那契数列
![](https://picx.zhimg.com/v2-977e585450f23ef303d4592289c5a8e0_720w.gif?source=8673f162)
未完待续…
1.二倍角公式半角公式
2.和角公式
3.平方求和
4.立方求和
5.曲面可以完全由直线构成
6.勾股定理
7.求和级数展开
8.泰勒展开
9.多边形外角和等于 360 度
10.前 n 个数相加
11.不等式
12.平方和与平方差
13.无穷级数求和
14.完全立方和公式
15.立方差公式
16.π 与理想弹性碰撞
17.拖勒密定理
18.斐波那契数列
未完待续…