secd
secd(x)
Compute the secant of x
, where x
is in degrees
Examples
In the Julia programming language, the secd()
function computes the secant of x
when x
is given in degrees.
julia> secd(45)
1.4142135623730951
Here are some common examples of using the secd()
function:

Calculate the secant of an angle in degrees:
julia> secd(60) 2.0000000000000004
This example calculates the secant of 60 degrees.

Compute the secant of multiple angles in degrees:
julia> angles = [30, 45, 60]; julia> secants = map(secd, angles) 3element Array{Float64,1}: 1.1547005383792515 1.4142135623730951 2.0000000000000004
It calculates the secant for each angle in the given array.
Common mistake example:
julia> secd(90)
1.995200412208242
In this example, the secant of 90 degrees is expected to be 1, but the function returns a negative value. This is because the secant function is periodic, and the input angle of 90 degrees corresponds to a vertical asymptote. When working with trigonometric functions, it's important to be aware of their periodicity and the domain restrictions to avoid unexpected results.
See Also
User Contributed Notes
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