cos 27 + sin 27/ cos 27- sin 27 = tan 72
cos 27 + sin 27/ cos 27-sin27
dividing by cos27 we get
1+tan27/1-tan27
tan(45+27) = tan72
cos 27 + sin 27/ cos 27- sin 27 = tan 72
cos 27 + sin 27/ cos 27-sin27
dividing by cos27 we get
1+tan27/1-tan27
tan(45+27) = tan72