Q$1$

$20$ Points

Multi$-$Choice Response. Select all correct answers. Points will be deducted for wrong answers selected.

Q$1\mathrm{.}1($a$)$

$5$ Points

Let $y=-cos(x),$ then

$\frac{d^{23}y}{d{x}^{23}}=-sin(x)$

$\frac{d^{16}y}{d{x}^{16}}=cos(x)$

$\frac{d^{18}y}{d{x}^{18}}=cos(x)$

$\frac{d^{9}y}{d{x}^9}=-sin(x)$