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If $\sin { \theta } =\cfrac { 3 }{ 5 }$ and ${ \theta }$ lies in Quadrant $I$, find $\cos { 2\theta }$.

A

$\cfrac{7}{25}$

B

$\cfrac{8}{5}$

C

$\cfrac { 16 } { 25 }$

D

$\cfrac{7}{5}$

E

$-\cfrac { 7 } { 25 }$

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