By the Law of Cosines, the distance d between two points (Figure 23) with polar coordinates (r,
Question:
By the Law of Cosines, the distance d between two points (Figure 23) with polar coordinates (r, θ) and (r0, θ0) is
Use this distance formula to show that
is the equation of the circle of radius 9 whose center has polar coordinates (5, π/4).
Transcribed Image Text:
d² = r² + r-2rro cos(8 - 00)
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