Use the Comparison Theorem to Determine Whether $\int _ { 1 } ^ { \infty } \frac { \sin ^ { 4 } x } { x ^ { 2 } } d x$

Essay

Use the Comparison Theorem to determine whether $\int _ { 1 } ^ { \infty } \frac { \sin ^ { 4 } x } { x ^ { 2 } } d x$ is convergent or divergent. Justify your answer.