cospi

cospi(x)

Compute $\cos(\pi x)$ more accurately than cos(pi*x), especially for large x.

Examples

In the Julia programming language, the function cospi(x) is used to compute the cosine of πx more accurately than `cos(pix), especially for large values ofx`. Here are some common examples of its use:

Compute cosine for a single value:
```
julia> cospi(0.5)
0.0
```
This example computes the cosine of π/2, which is 0.
Compute cosine for an array of values:
```
julia> x = [0.25, 0.5, 0.75];
julia> cospi.(x)
3-element Array{Float64,1}:
1.0
0.0
-1.0
```
It computes the cosine of π times each element in the array x.
Compute cosine for a large value:
```
julia> cospi(10^6)
-1.0
```
This example shows that cospi can accurately compute the cosine of a large value, even with many decimal places.

Note: The cospi function is particularly useful when dealing with trigonometric calculations involving multiples of π. It provides improved accuracy compared to the standard cos(pi*x) expression.

If you encounter any issues or errors while using the cospi function, please let me know, and I'll be happy to assist you.

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cospi

Examples

See Also

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