Actionscript3.0 - 왜 Math.cos (35.26) 값이 마이너스입니까?

Question

trace(Math.cos(45)); 
//0.5253219888177297 

trace(Math.cos(30)); 
//0.15425144988758405 

trace(Math.cos(35.264)); 
//-0.7606511017750149 

혼란 스럽습니다. 중학교에서 수학을 기울여야합니까?

Answer 1

당신이 전달하는 때문에도, Math.cos() 욕구 라디안 :

trace(Math.cos(toRad(45))); 
//0.7071067811865476 

trace(Math.cos(toRad(30))); 
//0.8660254037844387 

trace(Math.cos(toRad(35.264))); 
//0.8165005076106897 

function toRad($deg:Number):Number 
{ 
    return ($deg/180)*Math.PI; 
} 

Degree - Radian conversion