Select an expression to calculate $d$ for any star.
$d=\tan (\theta)$
$d=\frac{1}{\operatorname{san}(\theta)}$
$d=\sin (\theta)$
$d=\frac{1}{\sin (\theta)}$

Answer

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Answer

The correct expression is $d = \sin(\theta)$. \[ \boxed{d = \sin(\theta)} \]

Steps

Step 1 ：Analyze the given expressions to find the correct one for calculating the distance $d$ for any star using the angle $\theta$.

Step 2 ：The correct expression is $d = \sin(\theta)$. \[ \boxed{d = \sin(\theta)} \]