If a line has the direction ratios ` 18 , 12 , 4`, then what are its direction cosines?

Explanation

To find the direction cosines of a line given its direction ratios, we can follow these steps:

### Step 1: Identify the direction ratios
The direction ratios given are \(18\), \(12\), and \(4\).

### Step 2: Calculate the magnitude \(n\) of the direction ratios
The magnitude \(n\) is calculated using the formula:
\[
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