Question 274248
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The coordinates of a point P on the unit circle where *[tex \Large \phi] is the angle between the *[tex \Large x]-axis and radius of the unit circle that terminates in P are *[tex \Large \left(cos(\phi),sin(\phi)\right)]


Furthermore:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \cot(\alpha)\ =\ \frac{\cos(\alpha)}{\sin(\alpha)}]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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