js 已知角度和斜邊，求直角邊

//已知角度和斜邊，求直角邊
function hypotenuse(long,angle){
    //獲得弧度
    var radian = 2*Math.PI/360*angle;
    return {
        a:Math.sin(radian) * long,//鄰邊
        b:Math.cos(radian) * long//對邊
    };
}
console.log(hypotenuse(1,45));