Question: Let P be any point (except the origin) on the curve r = f(θ). If Ï is the angle between the tangent line at P

Let P be any point (except the origin) on the curve r = f(θ). If ψ is the angle between the tangent line at P and the radial line OP, show that
Let P be any point (except the origin) on the

Observe that ψ = Φ - θ in the figure

Let P be any point (except the origin) on the

tan - r= f(9)

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