All three if possible it would help alot thank you

15. Evaluate $?_{0}^{?} ?_{y}^{?} cos (x^{2}) d x d y$ . 16. Evaluate $?_{R} sin (x^{2} + y^{2}) d A$ where $R$ is the region $R = {(r, ?) ? 1 ? r ? 3, 0 ? ? ? ? /2} .$ 17. Evaluate $?_{0}^{a} ?_{? a^{2} ? y^{2}}^{0} (x^{2} y) d x d y$ by converting to polar coordinates.

Question

All three if possible it would help alot thank you
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15. Evaluate

?_{0}^{?} ?_{y}^{?} cos (x^{2}) d x d y

. 16. Evaluate

?_{R} sin (x^{2} + y^{2}) d A

where

R

is the region

R = {(r, ?) ? 1 ? r ? 3, 0 ? ? ? ? /2} .

17. Evaluate

?_{0}^{a} ?_{? a^{2} ? y^{2}}^{0} (x^{2} y) d x d y

by converting to polar coordinates.

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