JavaScript中的Sin和cos

Question

我正在尝试用JavaScript构建计算器.它除了罪和cos之外都有效,它们给出了错误和意想不到的结果.

Sin和Cos给出了错误的结果

罪(180)= 0

在代码sin(180)= - 0.8011526357338304

我的代码如下所示,

JavaScript的:

function d(val){
    if(val=="sin"){
        var x=document.getElementById("d").value;
        document.getElementById("d").value=Math.sin(x);
    }
    if(val=="cos"){
        var x=document.getElementById("d").value;
        document.getElementById("d").value=Math.cos(x);
    }
    if(val=="envers"){
        var x=document.getElementById("d").value;
        document.getElementById("d").value=eval(1/x);
    }
    if(val=="sqrt"){
        var x=document.getElementById("d").value;
        document.getElementById("d").value=Math.sqrt(x);
    }
}

function c(val){
    document.getElementById("d").value=val;
}

function v(val){
    document.getElementById("d").value+=val;
}

function e(){ 
    try { 
      c(eval(document.getElementById("d").value)) 
    } 
    catch(e){
        c('Error') 
    } 
}

HTML:

<div class="display">
    <p>
        <input type="text" readonly size="14" id="d">
        <input type="button" class="button black" value="C" onclick='c("")'>  
    </p>
</div>
<div class="keys">
    <p>
        <input type="button" class="button black" value="1" onclick='v("1")'>
        <input type="button" class="button black" value="2" onclick='v("2")'>
        <input type="button" class="button black" value="3" onclick='v("3")'>
        <input type="button" class="button pink" value="+" onclick='v("+")'>
    </p>
    <p>
        <input type="button" class="button black" value="4" onclick='v("4")'>
        <input type="button" class="button black" value="5" onclick='v("5")'>
        <input type="button" class="button black" value="6" onclick='v("6")'>
        <input type="button" class="button pink" value="-" onclick='v("-")'>
    </p>
    <p>
        <input type="button" class="button black" value="7" onclick='v("7")'>
        <input type="button" class="button black" value="8" onclick='v("8")'>
        <input type="button" class="button black" value="9" onclick='v("9")'>
        <input type="button" class="button pink" value="*" onclick='v("*")'></p>

    <p>
        <input type="button" class="button black" value="." onclick='v(".")'>
        <input type="button" class="button black" value="0" onclick='v("0")'>
        <input type="button" class="button orange" value="=" onclick='e()'>
        <input type="button" class="button pink" value="/" onclick='v("/")'>
    </p>

    <p>
        <input type="button" class="button black" value="sin" onclick='d("sin")'>
        <input type="button" class="button black" value="cos" onclick='d("cos")'>
        <input type="button" class="button orange" value="1/x" onclick='d("envers")'>
        <input type="button" class="button pink" value="sqrt" onclick='d("sqrt")'>
    </p>
</div>

请告诉我如何找到罪和cos的价值

Answer 1

将您的角度乘以:(? / 180),

哪里,? = Math.PI.

功能在radians,

因此,当你意味着180°时,功能接收180 radians.

这是10,313.2403°.