Find the value of $ cos(frac{pi}{4}) $ on the unit circle.
Answer 1
On the unit circle, the angle $ \frac{\pi}{4} $ corresponds to 45 degrees. The coordinates of this point are ( \frac{\sqrt{2}}{2}, \frac{\sqrt{2}}{2} ). Therefore,
$ \cos(\frac{\pi}{4}) = \frac{\sqrt{2}}{2} $
Answer 2
The angle $ frac{pi}{4} $ is 45 degrees. On the unit circle, the cosine of this angle is:
$ cos(frac{pi}{4}) = frac{sqrt{2}}{2} $
Answer 3
For $ frac{pi}{4} $,
$ cos(frac{pi}{4}) = frac{sqrt{2}}{2} $
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