Reverse the Order of Integration and Then Evaluate the Integral $$\int _ { 0 } ^ { 63 } \int _ { y / 9 } ^ { 7 } \frac { \cos x } { x } d x d y$$

Multiple Choice

Reverse the order of integration and then evaluate the integral.
- $$\int _ { 0 } ^ { 63 } \int _ { y / 9 } ^ { 7 } \frac { \cos x } { x } d x d y$$

A) 9 cos 7
B) 9 sin 7
C) 7 sin 9
D) 7 cos 9