element-wise cotangent function, argument in degree
y = cotd(x)
a real array.
a real array with same dimensions as
x
.
The entries of y
are the cotangents of the
corresponding entries of x
supposed to be given in
degree. t=cos(x)./sin(x)
. For entries equal to
n*180
with n
integer, the results
are infinite, whereas cotg(n*%pi)
is large but finite
because %pi
cannot be represented exactly. For entries
equal to n*90
with n
integers and
odd the results are exactly 0
.
--> cotd([30 45 60 90]) ans = 1.7320508 1. 0.5773503 0. --> cotd([-180 -90 0 90 180]) ans = Inf 0. Inf 0. Inf