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Find derivative of the function $y=x^9\tan(x)$.

A

$9 x^8 \tan( x)$

B

$9 x^8 \tan (x)+ x^9 sec^2(x)$

C

$x^9 sec^2(x)$

D

$ x^9 \tan (x)+ 9x^8 sec^2(x)$

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