The side opposite angle D has length 9, the side adjacent to angle D has length 40, and the hypotenuse has length 41.

$\displaystyle{\tan{{D}}}=\frac{\text{opposite}}{\text{adjacent}}=\frac{{9}}{{40}}\usepackage{cmbright}\Huge\$

$\displaystyle{\sec{{D}}}=\frac{\text{hypotenuse}}{\text{adjacent}}=\frac{{41}}{{40}}\usepackage{cmbright}\Huge\$