<PRE><B>Question 791257</B>
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I&#39;ll bet that *[tex \Large \sin\left(\frac{11\pi}{2}\right)] isn&#39;t on your &quot;cheat sheet&quot; either.  But *[tex \Large \sin\left(\frac{3\pi}{2}\right)] is, or certainly should be.  And since *[tex \Large \sin\left(\varphi\right)] is equivalent to *[tex \Large \sin\left(\varphi\ +\ 2k\pi\right)\ \forall\ k\ \in\ \mathbb{Z}], you can at least find *[tex \Large \sin\left(\frac{3\pi}{2}\right)] which is the same thing as *[tex \Large \sin\left(\frac{3\pi}{2}\ +\ \frac{8\pi}{2}\right)\ =\ \sin\left(\frac{11\pi}{2}\right)].  Then since cosecant is the reciprocal of sine... 


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
&lt;font face=&quot;Math1&quot; size=&quot;+2&quot;&gt;Egw to Beta kai to Sigma&lt;/font&gt;
My calculator said it, I believe it, that settles it
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