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

question 27

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

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