var math._tanP4 uses
math (current package)
tan.go#L63: var _tanP = [...]float64{
tan.go#L123: y = z + z*(zz*(((_tanP[0]*zz)+_tanP[1])*zz+_tanP[2])/((((zz+_tanQ[1])*zz+_tanQ[2])*zz+_tanQ[3])*zz+_tanQ[4]))
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