secd — Compute the element-wise secant of the argument given in degree.
y = secd(x)
The entries of y
are thesecant
1/cos
of the entries of x
given in degree. The results are real and in ]-%inf -1]
U [1 %inf[
. For entries equal to
n*180
with n
integer, the
result is exactly -1
or
+1
. For entries equal to
n*90
with n
integer and odd
the result is infinite(or an error depending on ieee mode).