computes the element-wise secant of the argument given in degree
y = secd(x)
a real array.
a real array.
The entries of y
are the secant
1/cos(x)
of the entries of x
given in
degree. The results are real and in ]-∞, -1] ∪ [1, ∞[
.
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).
secd(90) sec(%pi/2) | ![]() | ![]() |