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<p><font size="2">Hello,</font></p>
<p><font size="2">It seems to me that there is an error on r.mapcalc
manual page. The angle should be entered in radians and not in
degrees in the trigonometric functions...<br>
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<p><font size="2">Regards,</font></p>
<p><font size="2">Frank<br>
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