Calculate the Iterated Integral $\int _ { 0 } ^ { 1 } \int _ { 0 } ^ { y } 9 \cos \left( y ^ { 2 } \right) d x d y$

Short Answer

Calculate the iterated integral. $\int _ { 0 } ^ { 1 } \int _ { 0 } ^ { y } 9 \cos \left( y ^ { 2 } \right) d x d y$