-- | Trigonometric and hyperbolic functions and related functions.
--
-- Minimal complete definition:
--- 'pi', 'exp', 'log', 'sin', 'cos', 'sinh', 'cosh'
+-- 'pi', 'exp', 'log', 'sin', 'cos', 'sinh', 'cosh',
-- 'asin', 'acos', 'atan', 'asinh', 'acosh' and 'atanh'
class (Fractional a) => Floating a where
pi :: a