Answer
$\theta=32^{\circ}$
Work Step by Step
We know that;
$dsin(\theta)=m\lambda$
This can be written as:
$sin(\theta)=\frac{m\lambda}{d}$\
We plug in the known values to obtain:
$sin(\theta)=\frac{3(589\times 10^{-9})}{3.333\times 10^{-6}}=0.530$
$\theta=32^{\circ}$
