十个常用的泰勒展开公式cosx如下:
1、零阶展开:cos(x)≈1。
2、一阶展开:cos(x)≈1-(x^2/2!)
3、二阶展开:cos(x)≈1-(x^2 /2!)+(x^4/4!)
4、三阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)
5、四阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)+(x^8/8!)
6、五阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)+(x^8/8!)-(x^10/10!)
7、六阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)+(x^8/8!)-(x^10/10!)+(x^12/12!)
8、七阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)+(x^8/8!)-(x^10/10!)+(x^12/12!)-(x^14/14!)
9、八阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)+(x^8/8!)-(x^10/10!)+(x^12/12!)-(x^14/14!)+(x^16/16!)
10、九阶展开:cos(x)≈1-(x^2/2!)+(x^4/4!)-(x^6/6!)+(x^8/8!)-(x^10/10!)+(x^12/12!)-(x^14/14!)+(x^16/16!)-(x^18/18!)