RFC: add `sind`

[kgryte]

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Description

Description of the issue (or feature request).

Compute the sine of x where x is in degrees.

Package: @stdlib/math/base/special/sind Alias: base.sind

For a reference implementation, see Julia.

Related Issues

Does this issue (or feature request) have any related issues?

No.

Questions

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No.

Other

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No.

[rreusser]

Are the degree modules one-liners that multiply by pi / 180 and call out to other functions?

[kgryte]

Not necessarily, as one can perform argument reduction for better accuracy. See Julia, for example.

[kgryte]

Based on the reference implementation, implementing this package depends on kernel sin.

cc/ @Planeshifter

[vinothdinakar]

I see the above comments on May 6. Is anyone working on this? or can I try ?

[kgryte]

No one was yet to work on this as we have yet to implement kernel sin. @Planeshifter may have some insight into timelines for this.

[Planeshifter]

The kernel sin function is already there inside of @stdlib/math/base/special/sin, but needs to be separated into its own package. I can make this a high-priority item and work on this soon so that @vinothdinakar can tackle sind.

[kgryte]

@Planeshifter Looks like we will also need kernel cosine, as well.

[Planeshifter]

If you want to start working on this, @vinothdinakar, you could require the internal package functions directly for now, as in

var kernelSin = require( '@stdlib/math/base/special/sin/lib/kernel_sin.js' );

We can then replace the require statements once the standalone packages are up. I will have the kernel packages done by the end of the week, at latest.

[kgryte]

@Planeshifter Awesome!

@vinothdinakar Feel free to submit a PR once you have a working prototype.

[vinothdinakar]

Ok Thanks

[kgryte]

@vinothdinakar Just to give you an update, @Planeshifter managed to implement the various kernel packages:

@stdlib/math/base/special/kernel-sin @stdlib/math/base/special/kernel-cos

So, if you are still interested and/or already working on it, feel free to use the above packages. :)

Updated reference implementation: https://github.com/JuliaLang/julia/blob/9ef2af9db620644253941e080b5b4986ad0d6091/base/special/trig.jl#L1017