????????????????? "sho werking" ?????????????
???????? maebee yu meen "sho yer werk" ???????????????
kotangent=1/tan
so want tan(4x)=1/tan(x)
bi tri & tri agin, me get x=54 deg
tan(54deg)=1.3763825107117948
4*54=216deg
tan (216)=0.726542528
1/0.726542528=1.3763819