Expression 5: "r" equals StartFraction, StartRoot, left parenthesis, StartNestedFraction, "b" plus "y" Subscript, 1 , Baseline plus tan left parenthesis, "c" , right parenthesis left parenthesis, "g" , right parenthesis NestedOver tan "a" minus tan left parenthesis, "c" , right parenthesis , EndNestedFraction , right parenthesis squared plus left parenthesis, StartNestedFraction, tan left parenthesis, "a" , right parenthesis left parenthesis, "b" plus "y" Subscript, 1 , Baseline plus tan left parenthesis, "c" , right parenthesis left parenthesis, "g" , right parenthesis , right parenthesis NestedOver tan "a" minus tan left parenthesis, "c" , right parenthesis , EndNestedFraction , right parenthesis squared , EndRoot Over 1 minus StartRoot, left parenthesis, StartNestedFraction, 1 NestedOver tan "a" minus tan left parenthesis, "c" , right parenthesis , EndNestedFraction , right parenthesis squared plus left parenthesis, StartNestedFraction, tan left parenthesis, "a" , right parenthesis NestedOver tan "a" minus tan left parenthesis, "c" , right parenthesis , EndNestedFraction , right parenthesis squared , EndRoot , EndFractionr=b+y1+tancgtana−tanc2+tanab+y1+tancgtana−tanc21−1tana−tanc2+tanatana−tanc2
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domain \theta Minimum:
less than or equal to theta less than or equal to≤θ≤