Value of `cos0^(@). Cos 30^(@) . cos45^(@) . cos60^(@) . Cos90^(@)` is __________.

Explanation

To find the value of the expression \( \cos 0^\circ \cdot \cos 30^\circ \cdot \cos 45^\circ \cdot \cos 60^\circ \cdot \cos 90^\circ \), we will evaluate each cosine term step by step.

### Step-by-Step Solution:

1. **Identify the Cosine Values**:
- \( \cos 0^\circ = 1 \)
- \( \cos 30^\circ = \frac{\sqrt{3}}{2} \)
- \( \cos 45^\circ = \frac{1}{\sqrt{2}} \)
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