function mgf( t ) {
		var out;
		var st;
		if ( isnan( t ) ) {
			return NaN;
		}
		st = s * t;
		out = PI_SQUARED * sinh( st );
		out /= st * ( PI_SQUARED + ( st*st ) );
		out *= exp( mu * t );
		return out;
	}
Evaluates the moment-generating function (MGF) for a raised cosine distribution.

@private
@param {number} t - input value
@returns {number} evaluated MGF

@example
var y = mgf( 2.0 );
// returns <number>