function createStream1( a, b ) {
		return new RandomStream( a, b, opts );
	}
Returns a readable stream for generating pseudorandom numbers drawn from an arcsine distribution.

@private
@param {number} a - minimum support
@param {number} b - maximum support
@throws {TypeError} `a` must be a number
@throws {TypeError} `b` must be a number
@throws {RangeError} `a` must be less than `b`
@throws {TypeError} options argument must be an object
@throws {TypeError} must provide valid options
@throws {Error} must provide a valid state
@returns {RandomStream} Stream instance