Here is the answer for the question – **Cos Pi / 4, 3 Pi / 4, 5 Pi / 4, or 7 Pi / 4**. You’ll find the correct answer below

### Cos Pi / 4, 3 Pi / 4, 5 Pi / 4, or 7 Pi / 4

**The Correct Answer is**

**(Root 2) / 2**

### Reason Explained

(Root 2) / 2 is correct for Cos Pi / 4, 3 Pi / 4, 5 Pi / 4, or 7 Pi / 4

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