Expression 2: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 Over StartAbsoluteValue, cos theta , EndAbsoluteValue , EndFractionrθ=1cosθ
00
domain \theta Minimum:
less than or equal to theta less than or equal to≤θ≤
2 pi2π
domain \theta Maximum:
2
Expression 3: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 Over StartAbsoluteValue, sin theta , EndAbsoluteValue , EndFractionrθ=1sinθ
00
domain \theta Minimum:
less than or equal to theta less than or equal to≤θ≤