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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:

1. Calculate the secant of an angle in degrees:

   julia> secd(60)
   2.0000000000000004

   This example calculates the secant of 60 degrees.

2. Compute the secant of multiple angles in degrees:

   julia> angles = [30, 45, 60];
   julia> secants = map(secd, angles)
   3-element 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

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