Provide all trigonometric functions

[SuperFluffy]

Starting with #225, it's probably a good long term goal to implement all hyperbolic and non-hyperbolic trigonometric functions:

• [ ] cosh
• [ ] arccos
• [ ] arccosh
• [ ] sinh
• [ ] arcsin
• [ ] arcsinh
• [ ] tan
• [x] tanh (implemented in #226)
• [ ] arctan
• [ ] arctanh

Reusing the macro used in #226 to implement tanh, the other functions should be quickly implementable.