Answer
$31.7^{\circ}$
Work Step by Step
We can find the required angle as follows:
$\theta=tan^{-1}\frac{h}{d}$
We plug in the known values to obtain:
$\theta=tan^{-1}[\frac{(\frac{1}{2})(1.85)}{1.50}]$
$\theta=31.7^{\circ}$
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