cos(3x+20度)=0.95
3x+20度= 360度N +/- ARCCOS 0.95
3x = 360度N +/- ARCCOS 0.95-20度
x= 120度N + (+/- ARCCOS0.95-20度 )/3
代入N=0,1,2,3,...在 0度到360度内的有
得 x= 119.398,107.268,239.398,227.268,359.398,347.268 .
cos(3x+20度)=0.95
3x+20度= 360度N +/- ARCCOS 0.95
3x = 360度N +/- ARCCOS 0.95-20度
x= 120度N + (+/- ARCCOS0.95-20度 )/3
代入N=0,1,2,3,...在 0度到360度内的有
得 x= 119.398,107.268,239.398,227.268,359.398,347.268 .