cos1.2=cos(1.2*180/PI)=cos 68.755度=0.36236
sin1=sin(1*180/PI)=sin 57.296度=0.84147
sin(PI/3)=sin((PI/3)*180/PI)=sin 60度=0.86603
tan(PI/6)=tan((PI/6)*180/PI)=tan 30度=0.57735
cos1.2=cos(1.2*180/PI)=cos 68.755度=0.36236
sin1=sin(1*180/PI)=sin 57.296度=0.84147
sin(PI/3)=sin((PI/3)*180/PI)=sin 60度=0.86603
tan(PI/6)=tan((PI/6)*180/PI)=tan 30度=0.57735