I am trying to calculate the percent from a degree value using Xcode Swift.

For example:

1. I have a degree value of 0.2159
2. The Tangent value for this degree based off the tangent table is 0.00377
3. To find degrees, multiply tangent*100 which makes the percent 0.377%

Now, I can't for the life of me find a library in Xcode or even a package that would do this work for me. The tangent table is huge, so I am looking for a function that would do the conversion from step 1 to step 2 for me.

Thanks so much!