[Pitch] Angle Type

[taylorswift]

TrigonometricFloatingPoint/MathFloatingPoint protocol?

How would people feel about adding a protocol protocol MathFloatingPoint:FloatingPoint {     func sin() -> Self     func cos() -> Self     func tan() -> Self     func asin() -> Self     func acos() -> Self     func atan() -> Self     func ln() -> Self     func log(base:Self) -> Self     func pow(exponent:Self) -> Self     func exp() -> Self } to the standard library? Float and Double would then be made to conform by default using Swift implementations instead of having to import G…