<PRE><B>Question 858476</B>
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*[tex \LARGE \sqrt{2}\,\cos(x)\ -\ 1\ =\ 0]


*[tex \LARGE \sqrt{2}\,\cos(x)\ =\ 1]


*[tex \LARGE \cos(x)\ =\ \frac{\sqrt{2}}{2}]


Check the unit circle for the angle of the terminal ray where the point of intersection
with the unit circle has an *[tex \LARGE x]-coordinate of &lt;i&gt;positive&lt;/i&gt; *[tex \LARGE \frac{\sqrt{2}}{2}].  Hint:  Look in QI and QIV.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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