geoprocessing - Cosine 30

FabioGrita

Hello, 

can somebody tell me why for the Math function "Cosine" of the Spatial Analyst the Cosine of 30 is 0.154251 instead of 0.8660254?

I tried to create a constant grid using the cosine function and this is the result.

Many thanks

Fabio

DanPatterson_Retired

angles must be in radians and not in degrees

<SPAN class="keyword token">import</SPAN> math

math<SPAN class="punctuation token">.</SPAN>cos<SPAN class="punctuation token">(</SPAN><SPAN class="number token">30</SPAN><SPAN class="punctuation token">)</SPAN>
Out<SPAN class="punctuation token">[</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0.15425144988758405</SPAN>

math<SPAN class="punctuation token">.</SPAN>cos<SPAN class="punctuation token">(</SPAN>math<SPAN class="punctuation token">.</SPAN>radians<SPAN class="punctuation token">(</SPAN><SPAN class="number token">30</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
Out<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0.8660254037844387</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>