05-Math.less

.mysize( @horizontal, @vertical, @degree){
	width:round(
		@horizontal*cos(
			(@degree*pi())/180));
	height:round(
		@vertical*sin(
			(@degree*pi())/180));
}
.myclass_1{
	.mysize(320,240,30);
	background-color:blue;
}
.myclass_2{
	.mysize(320,240,60);
	background-color:blue;
}