Find the Third-Degree Taylor Polynomial of the Function $f ( x ) = \int _ { 0 } ^ { x } \sin t ^ { 2 } d t \text { at } a = 0$

Essay

Find the third-degree Taylor polynomial of the function $f ( x ) = \int _ { 0 } ^ { x } \sin t ^ { 2 } d t \text { at } a = 0$ .