Expression 3: "r" equals StartFraction, tan left parenthesis, theta plus theta Subscript, 0 , Baseline , right parenthesis Over 3cos left parenthesis, theta plus theta Subscript, 0 , Baseline , right parenthesis , EndFractionr=tanθ+θ03cosθ+θ0
00
domain \theta Minimum:
less than or equal to theta less than or equal to≤θ≤
piπ
domain \theta Maximum:
3
Expression 4: theta Subscript, 0 , Baseline equals arc cosine left parenthesis, 0.8 , right parenthesisθ0=arccos0.8