1rad=180°/π=180/3.14=57.3248407643312°
大约57.32°。
eg:30° = (30/180)*π rad =0.523598766666667 大约就是0.52360
剩下的同理可得了 π=3.1415926
解:把角度化为弧度利用180°=πrad。如果π=3.14,则
30°=π/6=0.52333、
,45°=π/4=0.785、
60°=π/3=1.04667、
90°=π/2=1.57、
120°=2π/3=2.09333、
150°=5π/6=2.61667。
30°=π/6=0.52359877559829887307710723054658
45°=π/4=0.78539816339744830961566084581988
60°=π/3=1.0471975511965977461542144610932
90°=π/2=1.5707963267948966192313216916398
120°=2π/3=2.0943951023931954923084289221863
150°=5π/6=2.6179938779914943653855361527329
30°≈0.52360
45º≈0.78540
60º≈1.04720
90º≈1.57080
120º≈2.09440
150º≈2.61800