我是在網路上看到的
Math.abs Function (JavaScript)
這個我了解了…就是不會有符號的數值?
Math.acos Function (JavaScript)
Returns the arc cosine (or inverse cosine) of a number.
傳回數字的反餘弦 (或逆餘弦) 函數值。
This is the trigonometric arccosine (inverse cosine) function.
Values for x should range from -1 to 1, with results from 180 to 0,
respectively. Any other input values will result in 'nan'.
我的試譯： ｘ會在負１到１之間，還有180到零，各別的
其它的輸入會被當為非數值
Math.asin Function (JavaScript)
Returns the arcsine of a number.
傳回數值的反正弦值。
This is the trigonometric arcsine (inverse sine) function.
Values for x should range from -1 to 1 with results from -90 to 90,
respectively. Any other input values will result in 'nan'.
我的試譯： ｘ會在負１到１的範圍之間，還有負90到90之間各別的？
其它的輸入會被當為非數值。
Math.atan Function (JavaScript)
傳回數字的反正切值。
This is the trigonometric arctangent (inverse tangent) function.
Results will range from -90 to 90.
我的試譯：結果會在負９０和９０之間。？
請問學JavaScript是不是數學要好呢?
因為我看這邊的教學就看不太懂…
我數學很差，以前都低分飛過，覺得這部份還蠻困難的
懇請板友高人指點一下，感激ＱＱ
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