js 已知角度和斜边，求直角边

//已知角度和斜边，求直角边
function hypotenuse(long,angle){
    //获得弧度
    var radian = 2*Math.PI/360*angle;
    return {
        a:Math.sin(radian) * long,//邻边
        b:Math.cos(radian) * long//对边
    };
}
console.log(hypotenuse(1,45));