︠1e194ff0-ba77-4caa-8cd7-514b2efaecf5︠
g(x)=-3sec(πx)
data=[(0,-3),(1,3),(2,-3),(3,3),(4,-3)]
a,b,c,d=var('a,b,c,d')
model(x)=a *-3sec(πx)
h(x)=tan(x-π/2)
data=[(π/2,0),(3π/4,1),(5π/4,-1),(3π/2,0),(7π/4,1)]
a,b,c,d=var('a,b,c,d')
model(x)=a * tan(x-π/2)
︠a42bb7a9-98da-4e96-9379-4963676df788︠
