Convert polar coordinate into Cartesian coordinate
`(2, pi/4)`

Explanation

To convert the polar coordinate \((2, \frac{\pi}{4})\) into Cartesian coordinates, we can follow these steps:

### Step 1: Identify the polar coordinates
The given polar coordinates are:
- \( r = 2 \)
- \( \theta = \frac{\pi}{4} \)

### Step 2: Use the conversion formulas
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