# cotd

cotd(x)

Compute the cotangent of `x`, where `x` is in degrees

## Examples

In the Julia programming language, the function `cotd(x)` computes the cotangent of `x` where `x` is in degrees.

``````julia> cotd(45)
0.6173696237835552``````
1. Calculate the cotangent of an angle in degrees:

``````julia> cotd(30)
0.5773502691896257``````

This example calculates the cotangent of 30 degrees.

2. Evaluate the cotangent of multiple angles:

``````julia> angles = [45, 60, 90];
julia> cotd.(angles)
3-element Array{Float64,1}:
1.0
0.5773502691896257
0.0``````

It computes the cotangent of each angle in the given array.

3. Use cotd in mathematical expressions:
``````julia> x = 30;
julia> y = cotd(x) + 2 * cotd(2 * x);
julia> y
0.473606797749979``````

It demonstrates the usage of `cotd` within a mathematical expression.

Common mistake example:

``````julia> cotd("60")
ERROR: MethodError: no method matching cotd(::String)``````

In this example, the function `cotd` is called with a string argument `"60"`. The correct usage is to provide a numeric value representing an angle in degrees. Make sure to pass a valid numeric argument to `cotd` to avoid such errors.

acos, acosd, acosh, acot, acotd, acoth, acsc, acscd, acsch, asec, asecd, asech, asin, asind, asinh, atan, atan2, atand, atanh, cos, cosc, cosd, cosh, cospi, cot, cotd, coth, csc, cscd, csch, deg2rad, rad2deg, sin, sinc, sind, sinh, sinpi, tan, tand, tanh,

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