Expression 5: "r" equals 2 "a" cosine theta left brace, StartFraction, 3 pi Over 2 , EndFraction less than or equal to theta less than or equal to "c" , right bracer=2acosθ3π2≤θ≤c
3 pi / 23π/2
domain \theta Minimum:
less than or equal to theta less than or equal to≤θ≤